NEC/TOKIN capacitor replacement on a Toshiba laptop - random shutdown or restart
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- เผยแพร่เมื่อ 5 ก.ย. 2024
- Replacement of a 0E907 CPU decoupling capacitor on a Toshiba Laptop. The procedure should be similar on other brands like Samsung. The laptop would randomly restart, even after ruling out software and power adapter problems. More details:
NEC/TOKIN datasheet: www.nec-tokin.c...
Panasonic replacement capacitors datasheet: docs-europe.ele...
Replacement capacitor part number: 2R5TPE330M7
RS part number: 788-7422
Article on tantalum capacitor failures: www.digikey.co...
Image URL: www.nec-tokin.c...
Thanks for the video.I ordered the panasonic capacitor and changed today the nec/tokin 0e907. Total time 30 min. No more random restarts. 👍
Thank you José ! I made an attempt with the Nec Tokin capacitor and it went wrong, then I saw your video. I bought the 4 capacitors online, I followed your good instructions and...voilà! My Toshiba came back to life :-). I am very happy. Thanks again for sharing the solution... Ciao!
Glad it worked. The original NEC capacitors are a pain to solder by hand.
Thank you very much Josè! I replaced the capacitor with those four capacitors and now my Toshiba is working again! You're great!
I'm glad it helped!
I believe your soldering method would be greatly improved if you would use a small amount of flux between component and connection point. It will help the solder to stick where you want it. If you can, practice once or twice using old circuit boards and components, it only takes a short time. You will quickly develop a feel for it. When you feel a bit more confident, give the real thing a go at it. But, flux is the friend of solder.
It's excellent when a 'fix-it' video like this, can help so many others and continue doing so for years after it was made. Thank you, Jose Faria!
Hi from Australia. You are a life saver. Thank you for making this video. I have been pulling my hair out for the last week trying to figure out this issue. I have disassembled this laptop before, but not sure if I have the confidence to do this myself. At least now I know what I am asking for at the local computer repair store.
Just wanted to thank you for this info, replacing tokin with 4 smaller caps did the trick.
Yeeah! Solved! I was convinced that it was the AC power supply! You avoided me to buy it and waste these money. Thank you very much for uploading this video
+Andrea Novello I'm glad it worked!
Excellent video, very well explained. I'm an amateur in this matter, I just have enough skills when it comes to soldering lol ... However I managed to repair my laptop after quite some time and this video helped me a lot. Thank you for sharing your knowledge, it's greatly appreciated.
I'm an amateur repairman as well, as you work in the hobby you get better and harder jobs start to look easier :)
hi Jose
thanks a lot for comment , i inspected really closely and saw maybe tiny bit over solder which i scratched off with flat screwdriver gentle and now working , so thanks for great video and help cheers mark
Yeah, that happened to me once, the only time this didn't work I had a tiny ball of solder in a via. Glad it worked.
Jose, Thanks for the video. I just wanted to try and understand your testing of the chip. When you first tested it showed 20mV. At the end you tested it and at first it was jumping all around but you said it was significantly lower. Then you looked like you changed it to Volts instead and it read 1.13V which is significantly higher than the originally test of 20mV.
Hi, first of all bear in mind that this test might not be that accurate and might vary a lot between multimeters.
Notice that I measured the milivolts in AC mode and the 1.13V in DC mode, the DC mode gives us the DC rail voltage of the CPU, the AC mode measuring a DC power rail measures how much that voltage jumps around.
It was jumping around because CPUs use a lot of current, that one probably has 30 amp spikes at full load, so it's normal to see a measurable AC component in the power rail, but notice that it never went above 2 or 3 mV with the new capacitors. The 1.1V reading was just to make sure the DC voltage was normal, and voltages between 0,8 and 1,3 volts DC are probably reasonable.
OK I think I follow. So testing mine I see that around startup time the DC voltage is 1.13V and stays pretty steady will windows 7 setup disk loads drivers, but after it gets to the setup screen to select options and continue it drops to about .764V for at least 10 seconds or more before finally shutting off. Im just trying to determine if this chip is definitely the cause because replacing it. This is an A305 model so it definitely has the years on it. Definitely seems similar to the other cases out there Ive seen. I have already isolated the board and it has nothing but the CD player plugged into it. I have also cleaned thoroughly and re thermal pasted the chips. The odd thing is is always seems to turn off the fan shortly before it happens and the heatsink definitely does build up heat, but that may just be a sideeffect from the chip. I have tested it with a large fan blowing on the board constantly and the heatsink is cool and it still happens. Any thoughts on the readings Im getting?
+Walter Hayden I think what you are seeing is normal, after Windows starts the computer starts using all the power saving features it can, including reducing the cpu voltage and disabling the fan until the CPU gets too hot for passive cooling, that is why the measuring mode I was interested in was the AC voltage, the DC measurement was just an afterthought.
Jose thanks. I think I have fixed it. A friend who is an Electronic Tech said I should try just adding a small capacitor to the existing oe907. i found a small 470uf cap with the same voltage rating and was able to mount it sideways against the oe907. After adding it, it has not restarted since. Not sure if that will last for days, months, or years.
+Walter Hayden If it does break again you could always add another one like you did just now 😆
This is the component that was replaced on my Acer Aspire 4736z due to random shutdown.
I'm thinkin of upgrading the nec tokin 0D108 on my Toshiba L745 to a uF470 with 6.3 volts. Because, preparing an upgrade to a Core i7 CPU. The model has a Nvidia GPU.
good explanation. found one such capacitor halfdead under cpu of my laptop.
thanks for your answer. is a satellite pro a300
What would happen if I turn laptop on without that capacitor? As my Toshiba laptop only runs in safe mode when plugged into AC power or normal mode with one cpu disabled
If the problem is the capacitor the symptoms will probably get worse if you simply remove it. It is degraded but it is still doing something, if you remove it altogether it probably won't go very far into the boot process, if it boots at all.
wow, this is the exact similar problem with my hp probook 4310s. What is the solution? please help me
So the bad cap messure 20 mv on v core wheen you change it the volt become 1.13 v i have 1 volt i add cap parraler with nectokin connected with wier put the problem is not solved the problem is lap work fine but the display is blank v5 v3 is ok from dc dc converter it is battay volt ok and before wheen i connect power cord it shutdown direct and i before uninstall one of the microprosseor from control panel
If it works, maybe the problem is somewhere else? You can connect an external monitor to rule out the LCD and cable, if that doesn't work the problem might be the gpu or somewhere else on the motherboard.
Ten problem miałem też w
acer aspire 6930g wymiana na 4x330uf i śmiga jak nowy
Olá José. Desde já, obrigado pelo vídeo. Já percebi que fez a reparação para um familiar e não o faz profissionalmente. No entanto, queria perguntar-lhe se sabe onde o posso fazer na zona norte (Porto, Braga, Vila Real...) Muito obrigado!
Honestamente não, geralmente faço as minhas reparações, mas imagino que a grande maioria das lojas de informática fazem este tipo de reparação. Pode procurar também lojas que reparem consolas, geralmente têm também todo o equipamento necessário para reparar portáteis e telefones. Em Vila Real conheço a Minfo, no Porto existem dezenas, como a PCdiga, Mbit, MHR em Braga não conheço. De notar que como é um serviço um tanto ou quanto trabalhoso pode sair caro, é melhor ligar primeiro às lojas a pedir orçamento.
Hey mate!
Thanks for the very detailed video!
What if we use an original NEC TOKIN OE907 capacitor?
Is it difficult to solder it?
Thanks!
I've never tried it, but the plastic case from the original capacitors is very sensitive regarding high temperatures, you will need to properly preheat the entire PCB to solder it without damage.
Thanks mate!
I installed 4 capacitors and it works fine!
So... You have a hot air gun and decide to tear the cap with those pliers? Are you serious?
Yes
Hello Jose, thank you for this excellent tutorial video I found very similar capacitors to yours , I stead of one ending in M7 I found an M9. The ESR changes slightly from 7 to 9 and the ripple current from 4400 to 3900. What do you suggest? Thanks in advance .
I reckon 4 of those should work, and while this is more guess work than science, 2mOhm shouldn't make that much of a difference.
I have acer aspire 5735z shuts off and turns on itself after several minutes whether being use or idle. tested windows 10, 8, 7 still same now i installed original os vista still same, temperatures are low no overheating cleaned all dust, replace all memory ram and hdd but still same shutdown and restart, when i boot on safemode it works normal no shutdown restart 9/10 times tested only once restart on safemode, replace power supply adapter, remove battery still same remove other parts like cmos battery, wifi, lcd cables, cdrom still same. So maybe it is the 0E907 CPU decoupling capacitor but i tested it with multimeter it reads around 1.2volts maybe normal?
1,2V is the DC component, the AC component, or ripple, is what might be causing your troubles, but if you have a NEC/TOKIN decoupling capacitor there is a good chance it is your problem.
José Faria thanks i was able to replace the nec tokin caps and it was solved... acer laptop working normal now, no sudden restarts..
good work bro ...👍👍 but i am not happy becoz smd tentalum 330uf 2.5v is not available in india😢😢
In most places it can be hard to find them in regular stores, the best way to get them is to buy them online.
okk bro...👍👍
thank you. I have a Toshiba L300 which has the same problem. I managed to replace the decoupling capacitor but upon testing it I realized the problem (pc not starting while plugged in and/or hangin) is still there. I wanted to attach photos that's why I asked u to mail me. where may I have gone wrong.
N. B: we do not have vendors of the replacement ICs in my country so I used some from an extra motherboard I had
Hi, there is no point in attaching photos, I'm not used to diagnosing PCs, but what do you mean the PC doesn't start, does it go throught POST and hang when loading the OS or it doesn't even turn on the screen?
P.S.: When you want to share pictures on the internet, you can use image hosting sites like these: imgur.com
+José Faria it goes through POST but that's only when it's on battery power. when it's plugged in it doesn't. plus occasionally it does random shutdown.
Kintango Chibelabela What kind of capacitor did you use for the repair?
José Faria I'm using a 330uf 2.5v capacitor
José Faria i.imgur.com/4KWvw60.jpg
hi i have just done your capacitor exactly as in video all steps the same , and went very well , however when i turn on the laptop the screen is completely blank (black) computer seems to turn on and all lights light up , but screen doesnt change stays black - any idea what might be cause and how to fix as was working befor this just when plugged into mains restarted itself but battery worked perfectly .
thanks
First open it up again and make sure you didn't accidentally short-circuited anything surrounding the capacitors you've installed, that happened to me once and that's the most likely scenario. It might be a blob of solder touching a via on the PCB, or a small capacitor that was slightly moved and is causing a short-circuit. Inspect the area thoroughly.
If that doesn't work, measure the voltage in the capacitors. If you measure it in the AC millivolt range, what is the value that you get?
Thanks
I have a Toshiba with the double row of small caps. Could I parallel them with a couple of "top up" capacitors to achieve a proper respectable capacitance?
Could you elaborate? What do you consider top up capacitors? If you are talking about a couple of small low ESR ceramic capacitors and a couple of higher ESR large capacitors in parallel, it will probably not work, remember that CPUs use a lot of current, some laptops can go up to 40 or 50 amperes, that's why all the capacitors should have low ESR, so they can quickly provide the stored energy when required.
I had a problem and i think this is it. Whenever i need to use my laptop, i need to use it every 2 weeks just to use it 2 - 3 days. I havent fixed it yet but i hope when i do this is the problem.
Hello. I have been experiencing the same problem. My laptop is Toshiba a300 from 2009, great machine otherwise. As your relatives one, mine has also been restarting or shutting down for no apparent reason or just freezing. But when it freezes sometimes there are vertical lines or all over the screen. You have not mentioned that symptom so I wanted to c with you if this could be a graphic card issue or still this capacitor? I can send you an image how the screen looks like. Many thanks for your help.
You might have 2 different issues, or it might be the same. Does it have dedicated graphics, especially NVIDIA? If so it might be a failing GPU. Replacing the NEC/Tokin capacitor is a cheap procedure, so my suggestion is to do this first and see if it gets better, then deal with any remaining issues later, one problem at a time.
@@jfaria Hello Jose. Thanks for the reply. The graphic card is ati mobility radeon hd 3400 series. Is there a way to do the hardware test of the card since there were no faults when I tested it via software. One more thing if possible, can u describe the full process of testing the capacitor, did you keep the motherboard connected to AC, to test it, I mean how did you get the fan going? Thanks
@@partytimebh Regarding the hardware testing, I don't know of any methods to do it. Regarding the AC component test, it was just a proof of the capacitor degradation. If the laptop is having stability problems and that tokin capacitor is present, it's almost certainly degraded. I would just replace it and see how it works out.
@@jfaria did you have the motherboard plugged in the charger in order to test the capacitor? And where do you touch with the multimeter probes to get the reading?
@@partytimebh Yes, on the capacitor pads. Is your multimeter capable of measuring high frequency AC?
Viva
Tenho um Toshiba A300-276. Há uns tempos, de forma completamente aleatória, o ecrã ficava com cores trocadas em tons de rosa, no entanto o portátil mantinha-se funcional. Por vezes com algumas pancadas voltava tudo a ficar bom.
Com o tempo esta solução foi desaparecendo, e foi aparecendo o problema de o PC se reiniciar de forma aleatória no windows, isto sempre com o transformador ligado.
Depois de pesquisar, reparo que este é um problema frequente causado pelo condensadores da NEC Tokin. Serve então o presente para saber se efetua reparações deste problema, e quais os preços. Obrigado
Boas, não, só faço isto para amigos e familiares, mas a troca do condensador não deve resolver o problema do ecrã, isso deve ser problemas do cabo ou do LCD (eventualmente a placa gráfica pode estar envolvida, mas como melhora com choque, deve ser problema mecânico).
Hi Jose, first off all, great video!!. I have a question. Can I use 2 x 680uf 4V? I removed the nec tokin and placed 2 electrolithic capacitors with little cables just for testing. But the motherboard does not want to start any more. The fan turns on at full speed when i press the power button. Thank You.
Hi, the problem is the Equivalent Series Resistance, you need extremely low ESR capacitors, like those I linked in the description. Electrolytic capacitors usually have higher ESR than tantalum, and with the added cables it increases even further. You can keep trying different combinations of capacitors until it works, but to be sure you need to use capacitors similar to those I've used.
OMG, it booted again!! Thank you!! I thought that I made a short circuit in the CPU socket because of the excess of hot air when I removed the Tokin. What I did was to remove the cables from the capacitors and soldered them directly to the motherboard. But the problem now is that it does not get into Windows. It shuts down. Only BIOS.
Henry Ríos Yeah, I bet your problem is still the capacitors, their ESR is too high. I reckon if you use good quality, low ESR tantalum capacitors it will work fine.
So, de bars inside is negative and the bars outside is positive? Can I replace for a single standard capacitor??
In this laptop model yes, positive outside, but you should check yours if it's not the same model, just in case. What do you mean standard capacitor? Those are regular capacitors, the special capacitor is the NEC/TOKIN.
U scrashed the board like that. please use low melt soldering.
how will he get low melt solder under the nektoken?
hi jose...i am trying to fix an acer aspire 2920z..it is an old laptop but no display and power shuts down after a few seconds.. followed your steps removing the nec tokin...when i tested the motherboard pins fir continuity there was no beeping....but when i cleaned the pins with soldering iron and soldering lead and i tested the motherboard pins again it was now beeping...did i short something when i cleaned the board?
You might want to visually inspect if you can find a short, but due to the nature of the circuit it's normal for the motherboard itself to read like a short circuit between the positive and negative trerminals of the capacitor pads.
Hi, thanks for the share, Excellent video!
Hi José! very nice video! My Toshiba A305 has the same problem but only restart or shut down with the charger plugged in. When the laptop works only with battery, no problem. Do you think the problem is the NEC/TOKIN? Thank you!
Hi, based on a quick google image search, that model appears to come with one of these capacitors, the symptoms match, if it is not working properly anyway you might want to try this.
Boas, José. Obrigado pelo vídeo, apenas tenho uma questão, se me puder ilucidar. Na reparação usa apenas 4 condensadores de 330uf. Por acaso já tinha visto noutros sites pessoal que usa 6 condensadores de 330uf. Existe alguma razão em especial?Obrigado
Creio que não. Quanto mais condensadores estiverem presentes, mais estável será a alimentação do CPU, no entanto chega a um ponto que ou não se notam melhorias, ou a fonte de alimentação fica sobrecarregada e pode ficar instável. Acho que não é o caso com 6 condensadores, a fonte não deve ter problema nenhum, mas como funciona sem falhas apenas com 4 e os condensadores são caros, acho que não vale muito a pena usar 6. De notar que as pessoas que usam mais do que 4 podem ter outro motivo, eu fiz questão de frisar que um dos parâmetros mais importantes do condensador de substituição é o valor ESR, é possível que os condensadores das pessoas que precisam de 6 tenham ESR ligeiramente mais altos e eles precisem dos 6 para compensar.
Ok, era essa a minha dúvida. Em relação ao ESR, eu vou mandar vir da RS o mesmo componente que mencionou na descrição. Mais uma vez obrigado. Boas reparações.
Boa noite amigo, eu tenho um Toshiba satellite a300 que o problema dele é: liga e a ventoinha trabalha mas não tem nada no ecrã. Simplesmente n da imagem... disseram me que o problema seria do nec tokin será possivel? E se sim devo meter quaos capacitores? 330 uf? Muito obrigado
Pode ser outro problema, mas se há quem diga que pode ser o NEC/TOKIN não perde muito em tentar. Certifique-se que os substitutos têm ESR muito baixo.
How did you knew the correct polarity ? on the big thing that you removed in the beginning there was no polarity labeled
+blackbirght The "negative" pad on the PCB is actually connected to the ground plane. Use your multimeter and check which of the pads has the lowest impedance to ground. In case of doubt, you can search for your specific laptop model number and check the images to see if other people did it the same way you are about to do.
+José Faria i did it, but it took me 5 hours, because while i was removing the token chip i managed to take out one of the super tiny capacitors just below the token, there are 4 of them in a raw, so 1 hour went into searching where it fall and 1 hour into soldering it with my 1$ soldering iron it worked vy miracle
blackbirght Yes, working with inadequate tools sometimes sucks. The small ceramic capacitors are important for high frequency decoupling, but I bet it would work even if you didn't solder it back in.
Oe 907 raplace with 2x 470uf 2,5v is working?
Fiz como no video, mais não vai, o ventilador gira 2 segundos e para sen iniciar; cuál pode ser a seguinte comprovação a fazer?
Talvez tenha feito algum curto-circuito ao trocar o condensador? Verifique todos os componentes perto da zona onde trabalhou.
Very nice, good teacher. Thanks
A peça CAP TANT POLY 330UF 2.5V 2917 funciona num Toshiba Sattelite Harman P300?
Se esse modelo vier equipado de fábrica com um condensador NEC/TOKIN, deve funcionar.
I have the same problem with a clevo w870. I found that when I heat the Nec tokin capacitor the laptop posts, but it doesn't load windows, immediate shutdown. 0D108 is the Nec tokin I have which is 1000 uf, can I replace it with 330uf x 4(1320uf) as it as a higher capacity with no risk?
There should be no problem because of the extra capacity, just make sure the replacement capacitors are low ESR ones.
Olá.
Obrigado pelo vídeo.
Realizei este procedimento e o computador arranca, passado uns segundos reinicia e fica a rodar a ventoinha. Não mostra imagem nenhuma no ecrã. O que poderá ser?
Se ele não fazia isso, verifique se não há nenhum pino, via ou condensador em curto-circuito.
Hi Jose, thanks for this video, i have the same pc but pentium dual core.. my problem is that with battery power up but no image, if i connect the AC adaptor, the portable starts but only 1 second show toshiba image and then restarts in loop.. is this capacitor problem?
It feels like it might be a capacitor problem. Try and replace it, even if it doesn't solve the problem it's a relatively cheap procedure.
Ηι,
My Toshiba Satellite L300 - 22L laptop shutting down after 1 or 2
minutes, what is the value of the nec tokin capacitor to change it?
Thank you very much!
I'm not up to speed regarding this procedure's cost on a repair shop, you should get a quote from a local shop near you.
I may have the same problem my laptop rebooting it self ... so from where can I get these capacitors online ? and can I use 2R5TPE330M9 ?
If you don't have access to a big electronic parts distributer like mouser, digikey, farnel, etc. you can buy them on ebay. That part number appears to be adequate, 4 of those should be ok on these laptops.
Where did you order the capacitors?
I believe those came from rs-components, just make sure you buy them from a reputable seller, like digikey, rs, mauser, farnell, etc. Otherwise you'll probably receive fake parts.
Is there any problem if you have 0D 128 that is 2.0v 1200 nF to replace it with 2.5v 1200nF?
No problem. Regarding capacitor voltage ratings, you can replace with a capacitor rated for the same voltage or higher, what you can't do is replace with a lower voltage capacitor.
My msi gp62 has the same restart problem, Even I disabled one of the processors pc had restart problem after a bit long time later. Can I solve this problem withn 4x330
After a quick search online, that laptop doesn't appear to use NEC/TOKIN capacitors: www.insidemylaptop.com/wp-content/uploads/2018/03/MSI-GE62-GP62-PE60-26.jpg
If that is the case you probably have a different problem.
Hi Jose.My toshiba satellite a300d gets very hot but not that much from the cpu fan as it is very hot at the palm rest area.So when it gets really hot then it shots down.Do you think if i replace the capacitors will solve the problem?Thank you for your excellent video.
Have you tried cleaning the fan and heatsink fins and replacing the thermal compound? If you didn't I would start there, it's easier and faster (and you should do it anyway, even if you were replacing the capacitor).
@@jfaria Thank you for the answer.All the above suggestions I have done from the first moment.I can't understand why one day can work for hours and maybe the next day just for 10 minutes.Thank you any way for your time.Maybe i will try to change the capasitors like your show at your video and will post the results here.
@@satfoxy I would change the capacitor for tantalum ones, they are not that expensive, if that doesn't work it's beyond me :D
Hi Jose, Thank you for the video. My laptop is Toshiba Satellite c850. Unfortunately, there are only two capacitors, NEC TOKIN OD158 and oe108, are available in my country. Do you think i can use this capacitor for my laptop?
They should work, but are a lot harder to solder.
@@jfaria Thank you for the reply. Is there any benefits using one of those two capacitors above over the capacitors on the video? Or should i just but this capacitor instead? "5x SMD Tantalum Capacitor 330uf 2.5v Replace NEC/TOKIN 0E907 OE907 0E128 OE128". It is my first time to try to replace a capacitor.
@@seehyunglee834 I would choose the capacitors in the video just for how easier they are to solder alone, the original ones can be a pain to sodler without damaging them. Both should work.
@@jfaria It's really a big help. Hope i can make it work. Thank you, Jose! :)
Boas, onde posso comprar esses novos capacitores?
Em casa tenho um toshiba igual com o mesmo problema e gostaria de o arranjar.
eduvito123 Em lojas online como AliExpress, eBay, etc.
Thanks José for the video :), I'm in a DIY mode haha so I was wondering if this capacitors(2R5TPE330M7) would work, to replace the "WR 2R5901" (its a Toshiba Satellite U500-12D)
I don't want to advertise any shop, so I will try to be generic: I saw an kit for this type of issue, but it is written 330 e74 and 330 e84. What does represent the last 3 digits "e84", "e74".
I've seen as well "Capacitores de Polímero de Tântalo SMD 2R5TPE330M9 2.5 V 330 UF POSCAP", with "330 e68" written.
I would be glad if you could give me a clue. (Im writing in english so other people could learn something from my doubts).
+Manuel Seromenho there are stores that sell these capacitor replacement kits, they will probably work fine. You can say what store it is, I don't really care 😃
Worked great for me, cheers!
i've ripped off the tokin and measured no continuity between the right solder strip and ground. But I'm measeuring 3 ohm between the left strip to ground (not complete short). Is this normal. Can I go ahead and solder the tantalum caps. It's a toshiba L750. I've looked closely with magnifier but can't see any solder crossing over to adjacent strip.
How don't remember how the laptop DC-DC converter worked, but that is not a short-circuit, if you don't see any fault with a visual inspection maybe it's just the way the circuit is supposed to behave? Have you tried switching the negative and positive probe to see if it's the multimeter that is switching some component on and causing the low impedance reading?
@@jfaria I removed cpu and measured high mega ohms reducing slowing. so i guess you are right. its just the way the circuit behaves or I've blown up the cpu haha.. i didnt use heat to remove tokin, so think cpu should be ok. I'll clean up a little more and solder caps, switch on and see how she goes. I'll let ya know. cheers.
@@Swenser 👍
Phew. All is well. Now to check if computer shuts off randomly. Ac ripple reading is 4mv steady. Was jumping around 40mv before. Was just odd to see CPU load as 3ohm. All good. Thanks for advice
@@tongdeenoinin6494 Nice
hi jose i have a laptop thats keep shutting down after 10mins i already change the thermal place and clean it i hope you could help me
If it has a similar capacitor to this one, you can try and do this procedure, otherwise I'm afraid I can't help you. Maybe try on an electronics repair forum?
great video thank you!
I have same problem after change nec tokin.
My laptop toshiba satellite A300. Auto power off in 30 seconds even no atached h.d.d or cd rom etc.
Maybe in this case you have a different problem? You might try asking for help in a forum.
Boas amigo
Tenho 2 Toshibas A300 ambos tiveram esse problema, no arranque do nada desligavam ou mesmo depois de algum tempo ligado, desligavam do nada.
Todos os nec toking são iguais para os A300?
Obrigado
Para o mesmo modelo devem ser idênticos, embora não seja impossível alguns terem tamanhos ligeiramente diferentes de acordo com o processador. Mesmo assim 4 condensadores de qualidade devem resolver o problema, independentemente do condensador que eles trazem.
@@jfaria , Boas onde posso comprar esses condensadores?? sou de lisboa. Obrigado
@@tuga130 pt.rs-online.com/web/p/condensadores-de-tantalo/7887422/
Como comprar na RS para particulares:
pt.rs-online.com/web/generalDisplay.html?id=particulares
Whats the name that you put something wire to melt before you put the capacitor?
That metallic wire is tin-based solder.
Ola eu tenho um toshiba a ter este problema de estar sempre a reiniciar .. Acontece que vi na web se fizessemos desligar um dos 4 nucleos do processador no windows ele iria funcionar ... Resultou em parte mas apos alguns meses esta na mesma.. Se tiver a bateria arranca bem se lhe encaixo a tomada ele desliga se logo sera disso! ? Eu gostava de saber se comprar o kit que ha na web e o suficiente ou e preciso uma mesa espcial para o efeito???! Grato pela ajuda
Viva, sim, provavelmente é isso. Se tem experiência a soldar componentes eletrónicos basta comprar o kit de condensadores, não é preciso nenhuma ferramenta especial.
José Faria obrigada pela prontidao em ajudar tem o meu like e sub :)
Gostava de dar uma palavrinha no sentido de resolver o meu problema seria possivel me indicar o seu contato ou perfil de facebook?! Obrigada
Have you ever heard of Tokin problem only on AC adapter powering while not showing any problems and fine on battery powering?
It was a long time ago, but I believe one of the symptoms was that the behavior was not the same if you were on AC and on battery, it was much worse in one of those cases (I don't remember if it was worse on AC or using the battery).
I can confirm that this is the symptom I experienced then and now. On Battery fine but on ac the laptop will eventually giev a blue screen and crash.
Ok so I've got enough responses that on ac adapted it can be the problem and battery ok. I guess because battery has a smoother DC supply. I've ordered the caps and will rip out the tokin. Thanks to all.
I have a question about soldering or getting new solder to pcb board. It seems that I removed base of soldering and now when I try to put new solder to board it turns out like soft rubber. Is there any way I can solve this? So it does not leave smooth surface.
If you can give me contact I can send you pictures. Telegram or mail
@@edinmiljkovic4908 Hi, upload the pictures to imgur.com/ and reply here with the link, please.
@@jfaria thank you for your response. Somehow I managed to set solder on pbc and conect broken points and now it works. Reason for solder not melting is probably due to heat conduction of Copper. Any eay problem solved. Thank you for the video.
@@edinmiljkovic4908 I feel your pain, cheap soldering irons suck, but I can't justify spending 750 euros on a JBC station, at least not on my budget. A proper soldering station has no problems soldering these PCBs heavy on copper.
Boas José... o meu toshiba a300 liga normalmente mas não dá imagem achas que o problema é o mesmo??? desculpa a pergunta (sou curioso ) Obg...
+sevens8 É sempre possível, mas acho improvável, apostava mais em problemas no chip gráfico.
José Faria boas, e esse chip grafico e o que está ao lado? Certo??? Resolvo com calor como já vi em outros vídeos???
+sevens8 nunca vi ninguém a fazer isso com resultados duradouros, ideal era trocar, mas são difíceis de arranjar.
hp 430 i3 1st gen same problem auto off after 10 minute replace fan but same
Hey maybe you know when pc normally shutting down where gose signal? i want to get turn off signal (not from the swich) becouse it dont operates when pc normally shutting down .thanks if you could help to find 😊
If I understood correctly, when the PC is shutting down there is probably not a special signal, it is software controlled, you might be better off using a software solution to detect when it is shutting down.
@@jfaria Thanks 😊
hello..this part can cause the power on but no image e consecutive power off and on with no image?...thanks
It is possible, but unless yours is in a very advanced degradation state, it usually works for a couple of seconds before shutting down.
+José Faria thank you for the reply, that helps, cheers
+José Faria só agora vi k eras português... Vi os comentários a baixo.... Kkkk.. Obg pela dika e o video, abraço
I have a Toshiba L855-10U, started with vertical lines and after a few days failed to boot.
Does 330uF 2.5V fits on this?
If it's just lines in the monitor it's probably another problem, be it monitor, monitor cable or some graphics IC.
@@jfaria I have tried with an external monitor and the chess/ vertical lines are there as well. this one has discret capacitores. two tantal, one 470uF and one marked "A8, jr" fount that to be 100uF 6.3V and a few ceramics. It fail to boot properly.
the 470uF is marked 24529 d or 24520 d
@@Sovepos1 Then you have a different problem. If the artifacts appear on an external monitor as well I would bet on a broken GPU or related part.
Hi José, my toshiba laptop turns on for about 10-15 sec. and then is
shut off at Windows load time. At the bios settings, same thing. So,
it's not the HDD. The motherboard has 4 of 330uf capacitors, not a
Nec/Tokin one. Two of them work at 1.030V, the others at 1.050V and
1.190V. It is good, right? So, where do you think is the problem? Thank you so much
for your time...
+adrian first I would rule out a bad power supply, but if that also happens on battery then you probably have a problem somewhere else. You would benefit from more experienced eyes in the laptop repair area, you should dig a bit and then ask for help on a forum like this one: www.pctechbytes.com/forums/forum/48-laptop-and-netbook-repair/
José, thanks for your quick answer. It's not the power supply. That happens on battery too. I will check the solution on that forum...muchas gracias
+adrian if they can't help you, you can always replace your tantalum capacitors with new ones, it does feel like a power supply issue.
José Faria, thanks a lot, I hope I will be able to find soon a solution for my laptop's problem
I have acer 4736z auto shuttibg down. I want to try this. Thanks for sharing
Good luck!
But i dont where can i buy this capacitors? My location is too far from the nearest city.
But well thanks!
You can use eBay, search for "nec tokin tantalum" and find a seller that ships to where you live.
If you can, buy from a reputable source, like mouser.com, farnell.com, rs-components.com or digikey.com
The capacitors need to be of very high quality, very low ESR, if someone tries to sell you 4 capacitors for less than 2USD they are probably low quality. (if you can only find low quality capacitors you can try them and they might work, but with brands like Panasonic you know they will work)
Thanks man! I'll try to find online. You're the man!
Love yah man!
holaarse nuevamente sera verdad dame tu opinion
Boas josé. Tenho um Toshiba A200 (quase com 9 anos...) Que tem sido carregado nos ultimos 3 anos com softwares pesados que tenho de utilizar na minha licenciatura em Eng. Eletrotecnica. Infelizmente há uns meses para cá tem-se desligado aleatóriamente sendo mais provável desligar-se quando trabalha a mais altas frequências, decidi defenir na bios o modo de frequencia da cpu a: "always low", ou seja, neste pc fica a funcionar a 997 megaHertz nem chega a 1giga haha. Aguentou-se bem durante umas semanas, mas neste momento tambem se desliga para estas baixas frequencias. Será que esta substituiçao dos codensadores NEc/Tokin resolve o meu problema? Há umas semanas atrás para a realização de um relatório de um trabalho experimental tive que pesquisar sobre o fenómeno ESR e fiz uma anologia com o que se passava com o meu pc, mas não sei se se trata da mesma coisa. Agradeço qualquer ajuda!
Boas, tendo em conta que esse A200 provavelmente usa um condensador NEC/TOKIN no CPU, é bastante provável que seja essa a causa, visto que eles se degradam com o tempo. Tendo em conta que os kits de condensadores de substituição são relativamente baratos e que o portátil ao reiniciar aleatoriamente já está perto de ser inútil, não custa nada tentar.
is it possible to do the thing with just a solder iron and the lead, i don't have that stripe thing you are cleaning the solder and the hot air gun.
It might be possible if you remove the old capacitor and it's pads by breaking and cutting with cutting pliers, but you might increase the chance of damaging the PCB.
@@jfaria is it good to use this capacitor Panasonic EEF-GX0E331R which is having lower esr and other values the same
@@jenickjohnson4361 I reckon it should work fine. If you're afraid the ESR will be too low you can use 3 capacitors instead of 4, but I would use 4.
@@jfaria and I did it, but it is still showing the same thing. But it never shuts off when in safe mode. What should I do
@@jenickjohnson4361 If it doesn't shut down in safe mode you might have a software problem, not a hardware problem, did you try a fresh windows install?
What is the voltage of capacitor ,that use for replacement??
2.5 Volts
Hi José, i have same model of this toshiba that was given because of not opening on ac plug but good sometimes in battery power, upon opening the nec tokin it was already repaired. It has only 2 caps rated 470uf and 220uf. Any advice on this? Thanks.
You can add 2 more to see if it makes it better, or just replacing them altogether, it might be the replacement capacitors failing as well. Make sure you use very low ESR capacitors.
@@jfaria successfuly replaced 4 low esr caps and the laptop comes on. But the problem is it cannot boot on windows. Just restarting up to the loading of windows logo. 😥
@@sandytangag1055 You might have another problem, then. I would start by ruling out a software problem by doing a clean windows installation, if that doesn't work then check HDD, RAM and so on.
@@jfaria yes, HDD is good because it runs good in other laptop, when i install fresh windows after loading windows file then it also shutdown and restart. But when battery powered, it successfuly boot. The battery are weak to completely installing windows. Thanks for your quick reply. 😊
@@sandytangag1055 Are you sure you didn't use counterfeit capacitors? They really need to have very low ESR.
O meu pc crashou e nunca mais ligou, só disse uma mensagem, Battery is died, poderá ser disto?
Tira a bateria e tenta ligá-lo só com o carregador. Se ficar instável pode ser esta a causa.
+José Faria Já fiz isso várias vezes, já troquei slots da ram, já fiz tanta coisa e ele liga mas não dá imagem
Pode ser isso, mas sem imagem também pode ser a placa gráfica, CPU ou BIOS... Abre o PC e mede a voltagem AC do CPU, se estiver acima de 20mV troca o condensador.
hi my toshiba L645 shotdown after the logo appears.
boas josé estou te a falar em portugues porque penso ser a tua lingua materna.. podes me dizer que fio é aquele que passas ao minuto 10:09.. obrigado
É malha de cobre com fluxo impregnado, serve para absorver solda. Todas as lojas que vendem componentes eletrónicos devem vender disso.
optimo video! obrigado
are you measuring AC with multimeter or DC?
The ripple was evaluated in AC
Hello José Faria, i have a toshiba L755 that it has a nec tokin 0D128, i have changed with 4 330uf 2.5v low esr, computer is working but it still keeps rebooting after a couple minutes. do you know anything else i can check to see if it solves the problem?
After a couple of minutes, could it be running too hot?
@@jfaria it doesnt look like its running hot. It looks like one of the positive sides were nec tokin is soldered it is shorting out. I measure in continuity mode and one side is ok, the other gives me continuaty to ground
@@brunorosa1359 If it was a short it probably wouldn't boot. Did it get better after the capacitor replacement? Were the capacitors bought from a reputable seller?
@@jfaria it did not get better after replacement of the capacitors, i got from a seller here in portugal that i already bought from him and it worked in the other computers i have fixed.
@@brunorosa1359 Ai és português, opá isso não é do condensador, se for garantido que a massa térmica está boa e os dissipadores bem instalados, provavelmente é um problema num integrado qualquer que aparece com o aquecimento normal, tipo o chip gráfico.
amigo aqui en venezuelazla vivimos en una caos total me entiendes amigo
Hi I replaced my Tokin a few years ago but the problem has come back but only on mains supply battery fine.. Do you think that its the Tokin again.Thanks for reading
If you replaced the NEC/Tokin capacitor with a similar one, it's most likely that. I would redo the procedure anyway, it's not that expensive and even if it doesn't solve it it rules out one of the problems.
@@jfaria Thanks - will replace with discrete caps this time I think
@@alanpickering4497 I went for the 4x tantalum solution alone just for being so easy to solder.
I have a Toshiba L750 with battery operations fine, but when plugging in ac with or without battery, system cuts off power and restarts at random times. Because battery works fine my reasoning is that all components are fine (TOKIN included) except the parts that are discrete to ac power adapter circuitry. I'm in the process of replacing battery IC because this IC outputs an ACOK line to the SuperIO chip. So that's my guess from looking at schematic thus far. Did you manage to fix your problem of power shutt offs on ac only??? I've tried other ac adapters and shut off happens in bios even after the computer sits while I'm watching the telly. Very strange problem. Usually its the other way around with battery problems.
@@Swenser do you come up with any solutions to this exact fault?
amigo si no consigo smd capacitadores podre utilizar los normales que venden en las tiendas de que tipo para reemplazar uno 2.5 voltios 330 microfaradios
En teoría, cualquier capacitadores sirve si tiene baja ESR y que encaja dentro de la portátil, recuerde que no hay mucho espacio entre la motherboard y el teclado. Será difícil encontrar condensadores electrolíticos con ESR tan bajo como éstos SMD. Si usted tiene acceso a los pagos online, lo mejor es comprar 4 condensadores en eBay o en aliexpress.
amigo yo vivo en vzla me quede desempleado ni se le ocurra venir a vivir a vzla esta verga es una dictadura un caos la delincuencia y los asesinatos campean por todo lados mira amigo de que capacidad puedo instalarle los normales amigo
ESR = Equivalent series resistance: es.wikipedia.org/wiki/ESR_(electr%C3%B3nica)
Cuando necesito hacer una reparación de bajo costo, a veces uso piezas de computadoras más antiguas, puede tomar buenos condensadores de otras motherboards y usarlos en su computadora portátil actual. La mayoría de las computadoras portátiles, incluso las muy antiguas, tienen condensadores SMD en varios lugares alrededor de la motherboard.
profesor encontre de 10 voltios capcitadores de montaje normal para reeplazar los capacitadores msd los podre utilizar yo vivo en vnenezuela amigo y aqui este pais es un caos necesito repara mi lapto el nec tokin avisame
hola profesor no consegui ni tarjetas madre viejas en ningun lado pero si hay capacitadores electroliticos de 10 voltios en adelante digame si puedo utilizar estos para reeplazar los capcitadores de tantalio msd par ael nec tokin esta malo de que capacidad amigo
Will any NEC tokin capacitor do the job what is available in my country is NEC oe128 and what's required is 0e907 explain and help me out little pls are there any alternatives to this that is safe?
+Sri Hari Karthik Hi, it should be fine. In this case you want a capacitance that is close to the original and the part you have available, 0e128, is larger and not too far apart from the 0e907. The problem is that either the 0e128 or the 0e907 are a bit hard to solder on the board manually, that's why people usually do what I did in this video and use 4 smaller capacitors instead, it's a lot easier to solder.
The last three numbers on those capacitors tell you the capacitance like this: 0eABC, where the capacitance is AB x 10^C
So if you want to know the capacitance of the NEC 0e128, you just take the two first numbers, "12" and because the third number is "8" you add eight zeroes, like this: 1200000000 and that gives you the capacitance in pico Farads, to convert to micro Farads you divide by 1.000.000, which gives us 1.200 uF
To know the capacitance of the NEC 0e907 the procedure is the same, you take the two first numbers, "90" and because the third number is "7" you add seven zeroes, like this: 900000000 and that gives you the capacitance in pico Farads, to convert to micro Farads you divide by 1.000.000, which gives us 900 uF
José Faria I will try to find the smaller smd capacitors and solder them replacing it, you do not have any problems till now from the laptop right? For how long is this fix expected to last and any tips ? Also thanks for replying
Sri Hari Karthik I've done this to 3 laptops in the last 2 years and they are still working fine. Unless you are unlucky, high quality, modern SMD capacitors should last until the end of the laptop's useful life. Just make sure you get quality, low ESR ones.
José Faria Ok thanks
one final question should the capacitor voltage be strictly 2.5V? or it can greater? i know it should not be lesser but can it be more? pls reply
panasonic 330uf 2.5v dc tantalum capacitor polymer solid +-20% tolerance POSCAP Series
RS part 795-5809 and panasonic part no.-. 2R5TPE330M9 is this okk or not plzz rply fast
+Khod Nishikant I never used capacitors with ESR that high in this application, but if you use 4 of those it should be fine
José Faria But ESR of 2R5TPE3307 is 7m Ohm and ESR of 2R5TPE3309 is 9m Ohm
Oh, then I misread the data sheet, those should be perfect, then.
José Faria thank bro😊
Can I replace it with 470 6v x 3.. Sorry I didn't watch the full video
Technically possible if they are very low ESR, but they are usually twice the height of the 2.5V ones and might be too tall fit inside the laptop.
I would like to know if electrolytic capacitors would do the trick ??? Thanks
+karim dorgham you can probably find electrolytic capacitors that would work, I remember using very low ESR capacitors from Panasonic, but I don't think you will be able to fit them inside the laptop, they are usually significantly larger that tantalum capacitors
i extract some smd capacitors from a dead motherboard and im wondering if it works ? capacitors with ref "NEu eJ8" wich means 2.5V and 220uF but i think that i need 6 units
+karim dorgham you can try with 4 and see if it works, but if you can fit 6 of them go for it.
it worked, thanks a lot
Nice, and you stopped a bunch of capacitors from becoming waste :D
Is this a good quality capacitor, 2R5TPE330M9?
It should work fine if you use 4 of them.
after change is not on the screen
My laptop turn off after a sec but after how many try it will turn on and doing fine I try to change my dc jack but the problem still the same I try to remove my hdd and open it the problem still there but when I remove my ram it turn on without problem is it possible that I'm having problem just like this?
It's possible, but if it works fine after a couple of tries it might be something else. The hard drive woudn't shut the laptop off, the RAM might. You can try a memory diagnostic tool or replace it with a cheap used ram module to check. Does your laptop have a capacitor like the one in this video?
@@jfaria Im not sure but I will check it but Im gonna bu new set of ram hopefully the ram is the problem
@@Ana-he1nl What is the manufacturer and model?
@@jfaria I have acer aspire v3-571G
@@Ana-he1nl That laptop doesn't appear to have a TOKIN capacitor, it's probably something else:
www.myfixguide.com/manual/wp-content/uploads/2014/04/ACER-V3-571-27.jpg
t.todayshipit.com/img/products/64712-para-acer-para-aspire-v3-571-v3-571g-laptop-motherboard-la-7912p-hm77-ddr3-gt630m-funciona-perfectamente.jpg
BoasJosé,estou com um problema troquei o meu OD128 (L755-1DR) por os 4 condensadores de 330 mas continua o mesmo problema.
Os condensadores são de qualidade (marca reputada e ESR baixo)?
@@jfaria tentei trocar por outros de melhor qualidade, mas acontece que devido ao excesso de solda nas pistas acho que entrou solda para os poros que estão entre as pistas e agora está em curto :/ Será que há solução?
@@freeWellasMF Improvável que seja solda nas vias. Não liga mesmo ou liga e passados uns segundos desliga?
@@jfaria como há um curto circuito eu ainda nem tentei ligar. Estou a tentar livrar me do curto mas não estou a conseguir. Alguma sugestão? é possível trocar contactos para falarmos logo ao final do dia?pfv
@@freeWellasMF Eu recebo notificações aqui, assim vejo quando tenho tempo.
De certeza que há um curto-circuito? Isso é um circuito de muito baixa impedância, não é possível que o multímetro esteja a confundir isso com um curto-circuito? Se esse multímetro tem a função de medir díodos, qual é o valor que dá?
What if I replace it with one peace NEC/TOKIN Capacitor,same excact one like before?
+Muky It will work perfectly, but the original capacitor is harder to solder, you will probably need to preheat the motherboard to high temperatures for you to solder the capacitor without damaging it.
+Muky If you are intent on replacing with a similar capacitor maybe but the cheapest, it should work. I still think the 4 tantalum capacitors are the easiest option.
José Faria i ordered already one piece because there is just like 100 pieces to order at once on aliexpress
So i just need to replace it and everything should work smooth?
Of your problem was caused by the capacitor, it should work fine after the replacement.
after change is not on the screen ??
Can you please elaborate? What do you mean?
hi my friend...can you tell me the model of the laptop on the video?
Hello, it is a Toshiba A300.
Thanks ... i have the same problem with the same model and i thing those capacitors are the good for me.Thank you again
John Kalos Good luck!
which capacitors should I choose for my NEC/TOKIN OE907 replacement? according to the datasheet its an 900μF with ESR of 1.5 mΩ. I searched and found this one: EEF-ST0E271R its a PANASONIC ELECTRONIC ALUMINUM ELECTROLYTIC CAPACITOR, 270UF, 2.5V ESR 6mΩ and it can run to up to 105 degrees as well, 4 of those would be closer to 900μF of my original tantalum NEC/TOKIN
Emeengor Looking at the datasheet, it looks like 4 of those capacitors should be a good choice, it should work.
amigo que significa ESR
Que estacion de soldar usas?
Uma estação low cost, comprada na minha loja de eletrónica local.
Hi Jose. I would appreciate your advice about this issue.
I'm a total amateur regarding repairing laptops but I have Satellite A300 and it seems there is a problem with that capacitor in my case also. I have TOKIN 0E907 type in the machine. But, I don't have spare parts as you have. I've found 4 KO 157 6K conductive polymer capacitors (datasheet.octopart.com/T520D476M016ATE035-Kemet-datasheet-8325930.pdf).
Can I use it as a replacement instead of the original (tokin 0E907). Your opinion, will it work?
Hi, 150uF x 4 is 600uF, lower than the 900uF the original capacitor had, but if they are very low ESR they will probably work. That code is not enough to know the full details, but at least they are made by a reputable company and they appear to be from a series with reasonably low ESR. If you have difficulties buying proper replacements you might want to try them, but there is a high chance it will not work, the capacitors you have are rated for 6V and small capacitors with high capacitance and extremely low ESR usually come with very low voltage ratings, like 2.5V. If it doesn't work, you can buy proper replacements on on sites like eBay, people are selling replacement kits, search for "nec tokin tantalum" and find a seller that sells to where you live.
I'll try. Thank you.
edit: Neah, didn't work. Going to get the right one.
So which one did you get?
***** In case of doubt, go with Panasonic.
can i use 330uf 16v normal capacitor not smd
It's really unlikely that they will have the required low ESR and they will be so large that it will probably not fit.
@@jfaria thank for your answer
please tellme where i can find suitable 330uf or 470uf capacitor in dead board because where i lives i can't find new one
@@anas96926 I don't have them on local stores either, I buy them on the internet. On this video I've used Panasonic capacitors with this part number: 2R5TPE330M7 try to find that part on online stores that ship to where you live.