Hp 2570p, blown mosfet and 19v power rail shorted to ground by a cap
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- เผยแพร่เมื่อ 2 ต.ค. 2024
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I don't have anything to say I only need to thank you for teaching us right now I have something to do because of you thank you again 👌👌👌
we have great teacher like you on youtube and we don't need to worry about our IT institution.
I love the simplcity of this guy repairs, no expensive oscilloscopes,no big workbenchs,just patience ,rational thinking...soldering iron and a strip of wire. :-) . Rispect.
waiting for the sledgehammer and cussing in Russian
Sorry, Romanian
@@marksilva309 I thought he is from Armenia.
instablaster.
your videos are very educational and easily to understand.
sorin is very happy he does not have to replace the mosfet (the board is blown ooo haaaa)😂😂😂😂
we love you teacher keep up the good work💯💯
I enjoy watching your analysis and patience sharing your methodology with us. it's always replace with most techs. But why the failure in the first place. I can't ever give up attempting to repair rather than replace. work on car computers/controllers. Circuit boards. But only after they've been replaced for upwards of $1,000.00. I repair and then they're passed to the next unsuspecting customer. I've gained plenty of information and techniques from you. i will add the motherboards and configurations of HP laptops are ridiculous. Thank you again.
Who else is watching the amazing sorin at 1am fix motherboards..
Watching next one now :)
i really enjoyed the video keep it come. from Philippines.
I have 3 of these boards to fix!, all with same symptom, not like this tho, when clicking power button, it flashes white 9~ times (matches no codes i found), the orange charge light can come on, but flashes constantly.
I am so eager to fix, happy i found this video, it will help a little.
I did my first laptop motherboard fix thank's to 15 minutes worth of your videos. It's quite simple once you get grasp of what you need to find. I plugged 19V on the power connector and got 19V on the mains so the connector and PSU were fine. Next I measured what voltages I get across the PCB, turns out I get 0,8V here and there, but not 5V on USB so that means that power isn't getting pretty from the mains. So I go and check the first 2 mosfets that 19V goes to and 19V didn't get past the first mosfet. I took it off and used a jumper wire and the whole laptop woke up.
It's amazing how simple issue can cause the whole laptop to not function. I'm pretty confident now that I can take on even tougher problems if the situation needs it, hence if the laptop is worth saving.
Even on this video I get the idea what you are trying to do and while experience helps, I assumed you would just go trough each component until you hit nothing and start taking suspicious parts out. I don't still have the hot air station required for this job to be easy, but I most certainly are gonna buy one now.
Thank's and keep it going!
It would be your first fail if you use jump wire on upper mosfet and in that time charger IC doesn't work properly. In this case all 19V would get through the whole motherboard...
@@london4983 and he will loose also charging the battery
@@london4983 Totally wrong, it seems you do not understand the principals of voltage rails in a notebook. The shorted MOSFET is not an UPPER MOSFET because its not part of a switching buck converter where upper and lower MOSFETS exist.
just try to find the fault next time, so checking why there is no voltage to open the mosfet. i had the same as you with the first mosfet :)
@@VincentTubed I also same problem here ,checking the power jack low voltage 0.44v only, please help bros
Im only watching your videos every day this is PROPER i will keep watching you have a good sense of humor in the workplace KEEP IT UP thanks for all the videos i think i have watched some of them more than 3 times. I see you speaking to someone while making videos is there a discord or are you just realizing we cannot see or hear sometimes ?
very nice troubleshooting sir.
Thank you very much for taking the time to teach.
Your such a very good troubleshooter....very nice thing to watch...interesting...
Wow bro you make this look so easily I hope we can be great like you one day
when you smoke your vape you're like sherlock holmes solving laptop homicides.
😂😂
I'm a big fan of you. Greetings from Kentucky. You are awesome, thank you for your videos.
Thank you
Sub guys, he deserves 10 mil
Watch your videos every day and compare with other TH-cam videos, yours are the best. Your troubshooting steps are clear and easy to follow.
You dont have to compare, everyone its special on his own way :)
@@electronicsrepairschool 🌹💚
@@electronicsrepairschool hi Sorin m your big fun till date.. i have Elitebook 2560p pretty much the same motherboard but now both first and second mosfet are blown completely.. and now i don`t know from the fuse where to loop the 19v..if you get this please help. thanks
I know I m late, but I just want to say, U are amazing Sorin! I just cant stop watching your videos.
Its Basic but youre a Machine Bro! =`)
ability to fix electronics without schematics - that's very instructive. Wonderful video. Thank you
I keep seeing you use a fluid to help find dead components when applying voltage. You call it "Petrol", but that doesn't translate clearly for me - obviously this couldn't be gasoline. What is the American equivelant? I've been trying to bring my motherboard back to life for a week. I've fixed a short, and now I can plug in my charger without it shorting out. However, I still cannot power on my laptop and I'm trying to identify the next fault. Your videos make learning an adventure, and I love it! Thank you for everything. Keep doing what you do!
zippo petrol or you can use alcohol
@@electronicsrepairschool I did not expect such a quick reply! It's like being contacted by a celebrity - I feel blessed that you reached out personally. Thank, you! I will let you know what the outcome is (if any). The original short that was disabling my charger was my second MOSFET. Now I need to find out what is grounding out the rest of the motherboard. I'm hoping with your excellent guidance that I will be able to get life breathing back into this machine.
@@electronicsrepairschool So, my motherboard is pretty soggy now. I've drenched my motherboard in Zippo lighter fluid and I cannot find anything. Am I performing this test correctly? I have applied 19v past the 2nd MOSFET because this is where I stopped reading 19v from the charger. I have my ground connected to one of the various screw holes. I've tested a multitude of the double MOSFETs on my motherboard and they are all reading ground on both sides. I've removed one of them and I'm still reading ground on the solder points on both sides - so this rules out the MOSFET, yes? I'm assuming something is bridging the ground and power circuit somewhere and that is why I'm reading ground on both sides? I just feel lost now. Any guidance you could supply would be greatly appreciated. I was hoping that this video would point me in the right direction, but now I'm just at a stand still and do not know how to troubleshoot this next.
Thank you!
@@electronicsrepairschool Alright. After a little bit of disassembly, I found the only component to be getting hot (at 5 AMPS) was the integral processor. So... does this mean my processor is toast? I've watched a bunch of your videos and I do not believe I've seen anything come up regarding processors. Thanks.
If you have any experience with working on them, this is an Acer Aspire V17 VN7-792G. If you know any tips or tricks, please let me know or link me to any related videos. Thanks!
I was waiting for the petrol, but this time no petrol.
Always learning. Thanks.
Patience, will be a second video about the theory of this job
19:16 use of petrol ! ;)
You are a magician
h aha ..this was an amazing fix....seriously guys...i nearly had a heart attack when he started tearing away the track on the mother board..i thought...YOU CANNOT BE BLOODY SERIOUS...then i thought ..well how you gonna fix that big hole now..and he bypassed the mosfet ..i thought ..surely that wont work ....and it did ..then when he started ripping multiple chips off the board.....man... this was like a bond movie to me...this guy man....this guy is crazy electronics guy..and can fix ANYTHING.
YOU KNOW WHY HE CAN FIX ANYTHING.
because he is romanian, and in romania you HAVE TO FIX IT OR SOMEONE ELSE WILL..SAME IN africa or india...not like in england where people just replace stuff or throw million pound laptop in bin....them romanians man...they fix and build anything......they can do anything. the mechanics there can hook up a volkswagen engine to a ford gearbox. all inside a citroen body..no messing.
rundown thomas: Mr Sorin certainly demonstrates how to do gorilla laptop repairs, and WIN. He omits parts, removes & reinstalls chips with NO flux nor cleanup nor fresh solder, and fights a soldering iron tip that looks 100 years old... WOW. He would save a lot of time with a FLIR camera, as he spends a lot of time hunting hot spots. I should be appalled, but I'm truly facinated.
Thank you very much, Professor Sorin.
(How in this glorious earth does he remember all the nicks and knacks he takes off) amazing
great job! Sorin!
you're so professional man i love your videos i will download them to watch them offline they will be my encyclopedia thank you so much sir sorin
what a genius guy !!!!
or Sorin.. I like that watch you are wearing here.. better than your new one.. This is another good one.. I learn so many things watching you.. I binge watch your videos sometimes.. 4 or 5 one right after another.. so good.. thanks my friend for taking the time to teach this old man!
MR.SORIN,I AM VERY HAPPY ABOUT YOUR WORK,IT REALLY.REALLY HELPS ME,THANKS ALOT.
BUT PLEASE CAN YOU MAKE A VIDEO OF HOW TO REPAIR ANY 19V LAPTOP CHARGER WITHOUT SCHEMATIC??
THANKS ALOT AGAIN FOR YOUR GREAT JOB.
Thank you Sir for all these videos and knowledge you have shairing with us , but i wanna ask you if you are the only repairer in that shop or there are others who help you like diana?
Messed up design? these elitebooks are the best ones out there. Mechanically exceptionally solid. I have a 2012 2560p with a sandy bridge i7 that I bought used in 2014. Best EUR 200 ever spent. Still a daily driver.
Man your amazing I learned a lot of things from you. Please don't stop making content that will strengthen our IT technical skills. Thank You the content that you uploaded are not taught in schools but by your time crafted experience.
nice work
Excellent patience to find problem.
Thank you so much. Can i know your name please
I fix my same HP 2570P Laptop.
This is amazing brother I have no electronics background. Thank you for doing these videos
Brilliant diagnose, as allways. It is amazing. We enjoy watching your videos more than the best cinema film. Thank you!
Wow nice work watching your videos is one of my biggest investment ..am one of your students simplicity in your explainations and clearity .thank you Sorin
Smart work 👌sir
How you can find a short when its very short haha!!!
May God bless u i started watching ur videos just last week n every night i do all night everyday to learn repair from u am so addicted to ur channel now
Hi all your videos I have watched thus far, are Great and very helpful. I have my HP 6730b Laptop. I got it form my friend as he told me it was working fine until one day he decided to switch it on and it was dead. At first, he suspected the Charger and went to buy a new one, then he tested the New Charger still it was dead.
Please assist me.
Thanks. I really like your video's 😀
Great job!
very good video :)
Excellent. Of course why not. Every time you explain everything. so it is very very helpful for learn how to service hardware of laptop. God bless you. Thank you very much.
Very good video realy . Can you send me solution for my elitebook 2560p . No sound. All drivers is ok i dwnload from hp suport . The softwar test showen good . But no sound .the botton led always on orange color. I need the schematique of cart mere .can i upgrad to i7 ? and what is the best prosessor can i use ?
Thank you
Sir, please make a video on laptop keys randomly and continuously gets pressed right from booting the laptop, even when no keyboard including internal keyboard is connected to the laptop. Sir, please always ensure that motherboard is always under your microscope. It makes us easy to understand.
Thanks.
i have one question , u showed us first u got 3.3v at the power button . how come if 19v power rail is short . kindly clarify
Did you connect the cable to the drain leg of the mosfet?
Did u discover the answer? I have the same problem with another laptop but i dont know where on the other mosfet i should do the soldering. Thank you very much.
Am learning not only circuit board maintenance but also how to treat customers. thank you for every thing that you did am always happy the method that you teaching us!
Checks:
Power indicator light is on, which means 19v, 3.3v is present.
Press the power button, not turning on.
Replug bios battery to see if the laptop is frozen.
Power button has 3.3v, press to pull to 0v, indicates power button is working.
Concluded that all power supply is good but the laptop is not turn on.
Suspect super io chip MC KBC1126 is mulfunctional
After taking apart, found blown first mosfet near charging port
Procedures:
Clean out the mosfet, pad is ripped, so bridge from next component to second mosfet
After that check with DC power, found charging port + is taking 2.4A, indicates a short to ground.
On the second mosfet, using the DC power and found there's something takingpower.
Solder a wire to the soldering pad on the second mosfet, and found there's power supply group getting hot.
Take off a mosfet, check shortage on the capacitor, still short, put this one back; take the second one off, still short, put this one back as well.
Take off the capacitor near them, found one of them is broken.
Put everything back. Connect the power and check if 19v is presenting; YES
Connect lcd and everything, got a picture, repair is done.
CONCLUSION:
THIS IS BASIC, YOU DON'T NEED SCHEMATIC FOR THAT! --- Sorin
赵晓明 help me, I have a Acer laptop that works but will not charge. The AC adapter light goes off when I plug into laptop. I get no 19v at dc plug on mobo, so I have a 19v to ground short right at the beginning of the circuit. I’m not sure which component to test, how do I test for bad mosfet?
I'm asking the same question The Tired Techie asked. Why didn't you use the petrol trick to locate the shorted, hot component?
dvsoria I think he run out of petrol, but he still had tricks to finish the job.
Patience, will be a second video about the theory of this job
Great video Thanks
Another nice repair. :)
u r the best
Never stop making these videos. It really helps.
Learning from Kenya
Thank you sir,your videos are excellent, am a great fan.
HP Business Notebooks are usually designed to be easily serviced by IT Techs, not Motherboard repairers.....
That was the good one, great repair! :)
Hi sir, do you have videos on how to test capacitor, MOSFETs and power supply using multimeter? Thanks in advance sir! Appreciate all your videos!
thank you sir good job
Brilliant YET AGAIN and Love the Pie Chart !
Good Day Sir, I am fascinated and engrossed for your teaching style which is more effective and efficient. May I kindly ask what petrol you are using for repairing, what we have here in the Philippines is unleaded, premium and E10. Thank you for your support.
Very impressive, Sorin! Power supplies are a pain and it is rarely a solid state device that is the initial cause of failure; capacitors are always suspect.
I often used that technique of checking the temperature of components. The difference was usually so small that I would check them on my upper lip until the day that a component was so hot that it caused a painful blister that I remember to this day!
You deserve more popularity to this chanel. You have by far the best tutorials and no messing about approach to repairs.
keep them coming :)
Thanks.
thank you
I am learning repair with your video. thank you!!
just a question how is the 19v power rail shorted but in the start of the video there was led light on the battery ? how is possible ? any explanation ?
you are great Sorin...God Bless You...
you are so clever
You are Amazing sorin thanks alot.
Dear, I still learning repairing laptop motherboards and I have success, but I still learning, one thing is super, and that thing is I realy love electronic and and making devices. Sorry for my bad english. Im from Srebia. I dont understand one thing. At the begining of the video, when you plug the charger you have white led light lighting on the laptop. And you said that mean that all the power supply have 19 volts an d 3.3v is ok, and startup chip is working. But when you dissamble laptop and take motherboard out, 19 volts is short. So no 19 volts on motherboard. In that case what produce voltage for startup chip?
Sorry, I didnt see the part2 video. Now I understand.
Please why don’t like switching power supply? Can you explain? I am sill confused
Always a pleasure ! better than Hollywood :)
Congratulations! You are excellent in what you do! By the way, what's the name of the liquid transparent you use before weld? Also, how much temperature you use in your soldering iron and the other of air (I believe)? You desolder the components very quickly! Thank you
Flux
2hat is he pushing next to the cmos at 7:30 min?
Does the laptop still charge after bypassing the first mosfet?
Sir good afternoon im from philippines i have an laptop Asus ROG encounter have display in hdmi but in screen no display sir can i mail you about it thanks sir TIA
What power supply did you used to give the 5 Amps to the short.My power supply just shows 5 Amps but no 19 V but only 0,05 V and nothing getting hot.I think that power supply is protecting itself.
Use a long wire to ‘fool’ the power supply protection
@@electronicsrepairschool Yes that is it.Thanks
so lets up the amps and wait for something to get hot :)
Sorin: This is basic
me "what the F just happend?" while i scratch my head
What didn’t you get?
That was amazing . I learn so much from your videos
What is the difference between the black caps and the brown ones when I test the black ones that are always short-circuited but what is normal but how do I test them?
What would you do with out that microscope - that helps out a lot - who makes that anyway
Sir may ask you a question on how to bypass a mospet
I think the last step you did, taking out ram was the main problem.
Great job. But i have a question. At the beginning of the video you said if you have light on the motherboard it means you have 19 volts and 3.3 volt power rails. And you were relating the problem to the startup chip. Now my question is how can we have 19 volts power rail if we have that blown up mosfet?
Mosfet was blown but probably the 19v goes through it
The main problem was the shorted cap
great fix but one thing isn't okay: you know that cap is blown and you removed it... of course it's running with only one BUT due to the small parts, i don't think it's fine enough with one...the output voltage won't be a nice DC-line... soldering a new one is taking you 2 minutes of work... and i even would try to re-fit a mosfet there... it's working but i don't think that it's there because the manufacturer had too many laying around.... this is not a repair i would be proud of...
Hey man, your videos are awesome! I subscribed and watched like 7 of them already. I am having a problem with my Acer e5-575g the entire laptop works 100% but will not charge and when I plug the AC adapter, the light on the adapter goes out. I have a short to ground on the 19v rail but I cannot find it. I get 19v at the dc jack but as soon as I plug the jack to the motherboard it shorts to 0v.
Any help would be appreciated. As in what to look for and where, I’m not sure how to test the mosfet. Do I test for continuity or for a specific resistance, and which pins?
This one might help you....? th-cam.com/video/rnZn6k-IMe0/w-d-xo.html
Yea I know he once spent 2 weeks fixing my plane engine years ago !! I thought he was lazy and slow , until I realised he’s a bike mechanic !! Ps plane still flying all ova world after 20 years
from egypt you are great man
good job, thank you for the lesson
How can you find a short when its very short and you have Christmas lights all over? 😆 Sorin pls tell me one thing. Now suppose I happen to buy linear power supply of some other brand will it also have those relay contacts and make the clicking noise is there's a short? Do all linear power supplies have relay protection but default? Your answer will be useful for many I suppose. Thank you. 👍😊
At least HP Supplies proper Service Manuals for their Notebooks meaning they are a lot easier to pull apart than pieces of shit Notebooks like Acer....
Hey bro. i have a question. I have a hp 2570p i5. Last month it stopped working without any reason (maybe because of power problem of home). I changed Ram, Hd and CPU, but doesn't work. Just fan work for some seconds and again off (repeat repeat ...). Just one time turned on for 30min I updated bios and installed new windows, off again and again fan on off ..... . What's your idea? If I take a new Motherboard will work again??? Thanks
Always very informative videos. why don't you get a thermal camera? I believe would make finding something hot very quickly...
I saw fireworks at midnight on New Years .. 2021, as they were sparking off the mosfet on this board! :) What do yah know! LOL Happy New Year! - Jesus IsReal