I work for a small electronics recycling company and often come across these dells with this exact issue. Very interesting to know now what the problem may be caused by. Unfortunately I never have the time to try and learn to repair at work. I am considering purchasing some broken units and learning how to fix them at home. Thanks very much for these videos.
20:04 look at the marks. PL2 and PL1. "L" always means coil, PD1 / PD2 - "D" means diode. PQ1/PQ4 - "Q" means transistor PC100 - "C" means capacitor PJP200 - "JP" means jumper PU8006 - "U" means IC/unit PR721 - "R" means resistor etc.
Really enjoyed this one, Sorin. A bit disappointing that such a modern and sleek laptop is so difficult to disassemble. But as usual, you found the way. I always like you when you think of old times and tell us what it was like. Will definitely check out the Chernobyl series you recommended. Sounds good!
Brilliant Sorin! I got one with same problem, and the same caremic capacitator was wrong! The owner said that she plugged in the charger and heard an explosion and then turned it off.
I had a 5430 last week, I spent most of the day taking it apart, and putting it back together to replace the cmos battery. I had to completely disassemble the damn thing to get to the battery, I had over half a dozen piles of screws, and the screws were 3 different sizes. I ended up upgrading the CPU while I was there, that was the easiest part. It was prettymuch a full days work just replacing the damn coin cell battery.
Sorin, I have experience with modern Dell laptops and the reason the laptop is not coming on right away after the BIOS battery is removed is because the BIOS is going thru an initialization and figuring out everything on the board. If you have the fan installed it will run it at max speed and cycle multiple times. Sometimes it even errors out and flashes the LED codes at which point you have to unplug and restart. Normally you don't touch the power button until the first screen comes up.
I am fan of your all TH-cam video i like all video Chernobyl movie excellent i saw USSR President Mr Mikhail Gorbachev speech long back on youtube it self Thanks Vijay from India
Mine had the same problem. No power on. No charging light completely dead. I unplugged the bios battery and shorted the pins and plugged it back in and its working fine now
Dell happens to be an excellent vendor in providing documentation. I would have investigated if there was tear apart documentation for this laptop before preceding.
Great Job tracking the problem, but how did you chose the replacement cap? no marking no schematic, just any cap will do or what? what is the trick in selecting replacement smd caps?
A lot of business laptops used to be built this way, with components like RAM, the WiFi card and hard disk being easily accessible, but for taking out the motherboard or CPU fan one would have to take the whole laptop apart.
Dell on its website provides the service manual for each of its laptops, to find it just search on Google for the "laptop name + manual", in my opinion you spend less time consulting it rather than improvising the disassembly, also with the manual there are less risks of damaging the laptop
_"You get what you pay for."_ ... Except if you buy a Range Rover, for example: _expensive_ AND _unreliable_ -like quite a few other 'prestige' luxury items, besides (including Macs, imo, assuming Rossmann's repair videos provide a good indication; ex: corrosion issues)! I think the 'you get what you pay for' idiom is more true for necessities (i.e. stuff you actually need), but rarely-if maybe ever-for stuff you desire (things you don't need, but are often suckered into desiring anyway, especially high-status items with perceived symbolic value). _"Value is paying for what you need, not what [you think] you desire",_ is how I would put it.
just a quick question,.,..,,.when you set you power supply to 19v...do you set up the amps also..or how do you know how much amps is there already when you inject the 19v ,,or you tuen the amps very low before you inject 19v..thanks
You are so good, thank's a lot for sharing. By the way i have a presario compaq cq60, external screen works but not internal screen. i did change the screen wire that goes from the laptop to the screen. the converter and the screen and still no internal image. so would it be a motherboard problem? LVDS line or voltage? My 3.3 volts is on tthe screen plug, my 19 volts goes on the plug too and 5 volts i think i saw too i'm not sure is also on the internal plug. External screen works fine. So, since it's not the graphic chip, what do you think i should check? You are the only one i trust to help me. Hoping for an answer. Thank's sorin. Best regards. Serge.
Sorin: I have an e7470 which does not charge. I find out that the center pin (the one that determines the charger type) is grounded/shorted. Do you have the wiring diagram of this board or do you know where I can find it? Thank you.
I have just solved a non charging issue with a e7470. I'm writing just to summarize what I found for others. 1. Check charger and center pin. 2. DC adapter port might have a broken wire 3. Mother board might have a bad chip (I had a broken diode PD6 5V: Digikey: 1727-3936-1-ND) I have circuit diagram if anybody needs.
Mr. Sorin: _"I have to remove the screen; because, the hinge, it's over the motherboard. It's a crazy design. . . .So, everything is removed and the motherboard should come out easily, which is not happening-for some reason."_ ...Yep! The disassembly of these Dell Latitude-"Attitude"-laptops is awful: you need to take EVERYTHING apart to get to the motherboard! Misery. I just finished one (E5410), and it took _like_ 2 hours to carefully disassemble and reassemble the f***ing thing; and I still wound up with a "bonus" screw! I even dreamed this morning of finding where the extra screw was supposed to go! PTSD. Next time, I'll try Paul Daniels' technique of using a 15-compartments pillbox to keep track of roughly where each screw comes from, with respect to the laptop's overall layout; Sorin's expert approach of confidently shoving them to the side doesn't work for me! Hehehe. One good thing, though, the online Dell service manual gives _very detailed_ step-by-step instructions-with photos-on how to do the disassembly. Also, the electronics hardware looks pretty solid and full-featured, and I also like their 3 diagnostic LEDs setup (if you've got power).
hi sorin my name is george and i wanted to ask you if you can help me. my neighbor has a laptop dell e5450 zam 70 rev 1. i opened the laptop and i noticed that pq4 was all burned out so i tried to figure out which is the fault and i found some shorted capacitors near pq705, i removed the damaged one and bridged pq4. I tried the laptop half disassembled and it seems to go. my neighbor has two children who now need a laptop to study and I'm afraid they'll get hurt. Can you tell me what this pq4 does and if it is dangerous to leave the jumper without mounting another same component and its capacitor, thanks in advance and apologize for my english i am using google translate
When I plug in the charger to my laptop and press the power button,laptop fan and lights on for few second then dies..press the power button again and nothing happens..I found out that the lm358a ic gets warm when I plug in the charger..is it the cause? And can I use a lm358/ lm358p instead?
Hi Firstly thanks for all videos I learn many things and resolve many computer by following your steps. But now i have a problem with fujitsu li 3910 When it reach 26% become (plugin ,not charging) .problem is when i remove battery the laptop couldn’t turn on with power ic only.battery should be in. I tried with another charger, but still same problem. Can you guide me pleas?thanx in advance.
This was really interesting. Thunderfoot here on youtube said that the film was not accurate because the explosion couldn't be that big what they described. That was an interesting video as well.
Hi..I need help of my sony vaio Sve15124cxs..recently i have problem the machine wont turn on...when i press power button the battery icon and the startup led indicator just blinking...then i trided this method.. Remove the battery and charger Then hold up power for 1 minutes After that insert battery and plug the charger it turn on and works fine untill it shut down..but when i restart the machine ot turn on and after 1 to 2 min it shut down automatically...and wont turn on again... Why its happen..pliz help Rather then i remove the motherboard and clean all dust and reaasemble everything then when i power up nothing happen..after a few minutes..when i power on it turn on and use about 12 hrs..but when i restart the device it won't start and only green light appears for a second and turn off again..in a word it sometimes turn on sometimes not..what is the issue..?? Thnx
I remember that period too , no wide leaf vegetables like spinach no mushrooms and for the following years no cigarettes , the worst known nuclear accident
Hi! after doing a repaste on my DEll G2 3590 I got no charging led no fan spin. The first time I tried to power it on I saw the charging port led blinking white, but only once it was too fast for me to see the pattern. Tried Taking out the Bios coin battery, disconnecting the main battery and holding power for a couple of minutes. I checked voltage from charger and from battery and both are good even plugged to laptop I do not see any voltage drops. Does any one has an advice of what I am doing wrong? now I ill just connect to the charger for a couple of hours that the battery was completely dead. Help! I am running out of ideas.
Thanks for your teaching, please help me l am a computer technician, l have a challenge on dell Latitude 5490 not charging, not powering on with DC adapter but powering on with batter. I would be very glad to have your help on this issue thanks for ur cooperation
Best thing about Dell computers is that they provide full featured detailed disassembly manuals for all their laptops. Free of charge which Ive loved about them since forever. For example here's how to remove the keyboard on that specific model. www.dell.com/support/manuals/us/en/19/latitude-e5250-laptop/dell_latitude_e5250_bdw/removing-the-keyboard?guid=guid-dbcdd0d6-5888-4d1e-ac3b-6737a2070bf6&lang=en-us
Hello, can you please help me. I have dell latitude e5570. does not charge Battery unknown charger in bios. I tried different original charger all the same problem. in bios test battery is excellent. if i put the dc jack in for only 3 seconds white light then off. greeting
Impressive...I really like the mention of 'crazy design.' Designers need to do better. How many thousands of these have simply had 'techs' replace the motherboards? I wish more people did actual repairs, very rare, and unfortunate.
HI , did you had a problem with a BIOS chips on these DELLs ? Chernobyl - very good one , Russian media is pissed off big time for showing all this :D I have these Dells very often with bad boards and send them for repair every other month.
My dell laptop was charged with a reverse polarity and heard an explosion pls can you suggest me with a solution to the problem. I will be very happy if you could help pls. Thanks my guru
When I was little, I also got iodine to drink after the Chernobyl cloud, I was in the 7th grade at the time. Poland is close. I understand what you mean when they lie to people.
Miał może ktoś taki przypadek że laptop się włączał i był czarny ekran i tylko jedna kreską i wie co mogło się stać ten sam model laptop Lub jak zrobić reset bez właczania
What a difficult dissembled laptop
Thank you Sorin for a nice video
I work for a small electronics recycling company and often come across these dells with this exact issue. Very interesting to know now what the problem may be caused by. Unfortunately I never have the time to try and learn to repair at work. I am considering purchasing some broken units and learning how to fix them at home. Thanks very much for these videos.
This profession needs so calm man, and you are Sorin.
I wish all the best in your life.
20:04 look at the marks.
PL2 and PL1. "L" always means coil,
PD1 / PD2 - "D" means diode.
PQ1/PQ4 - "Q" means transistor
PC100 - "C" means capacitor
PJP200 - "JP" means jumper
PU8006 - "U" means IC/unit
PR721 - "R" means resistor
etc.
you are sooooooo smart
@@stevejoseph3129 whats the p?
@@johnquiachon2823 my guess p stands for part
The P stands for Power. I.i. It is high current carrying component.
Really enjoyed this one, Sorin. A bit disappointing that such a modern and sleek laptop is so difficult to disassemble. But as usual, you found the way. I always like you when you think of old times and tell us what it was like. Will definitely check out the Chernobyl series you recommended. Sounds good!
Good. What a nice work man.
Mine also has the same issue, but I'm glad to find the right person to help.
Brilliant Sorin!
I got one with same problem, and the same caremic capacitator was wrong!
The owner said that she plugged in the charger and heard an explosion and then turned it off.
Another great job...thank you Mr.Sorin
Thank you very much! Very useful lesson :) My Latitude is alive again
i watch all your video every day i learn alot from you sir ..you so amazing thank you
Wow, what a job. You taught me allot, Thanks.
Nice Work Sorin ive repaired a couple of those to seems to happen a lot of the times bad caps
thank you so much for your teaching, I really appreciate it
Thank you sir I'm downloading your all videos
hi there, i appreciate your valuable time and knoeledge
You are perfect. Thank you for teaching us your experinces
this is a interesting tutorial about caps but more than that..Sorin review a secret about bios battery in dell brand laptops....so thankful sir
I had a 5430 last week, I spent most of the day taking it apart, and putting it back together to replace the cmos battery. I had to completely disassemble the damn thing to get to the battery, I had over half a dozen piles of screws, and the screws were 3 different sizes. I ended up upgrading the CPU while I was there, that was the easiest part. It was prettymuch a full days work just replacing the damn coin cell battery.
I like watching your videos. not bored at all.
yeah what a great professional work . very very helpful yeah , keep up good work man, all the way from manila Philippines yeah.
Sorin, I have experience with modern Dell laptops and the reason the laptop is not coming on right away after the BIOS battery is removed is because the BIOS is going thru an initialization and figuring out everything on the board. If you have the fan installed it will run it at max speed and cycle multiple times. Sometimes it even errors out and flashes the LED codes at which point you have to unplug and restart. Normally you don't touch the power button until the first screen comes up.
You are the best Sorin. Please mention how you find out when the short is close or no.
real master ! :) and all than without thermal camera ! Respect !
Nice one sir that was a nice one
Super Video.Danke!
I am fan of your all TH-cam video i like all video
Chernobyl movie excellent i saw USSR President Mr Mikhail Gorbachev speech long back on youtube it self
Thanks
Vijay
from India
Mine had the same problem. No power on. No charging light completely dead. I unplugged the bios battery and shorted the pins and plugged it back in and its working fine now
im learning how you think to find this problems (thank you - brazilian student)
Sorin:This should be short video.....
Dell: lol
Hey!What is the micro element p04 near to the power DC port .Thanks in advance!
You are awesome Sir!!!
God bless you man, appreciate your time and efforts, thanks too much.
Dell happens to be an excellent vendor in providing documentation. I would have investigated if there was tear apart documentation for this laptop before preceding.
There is...
For this and all their hardware.
I love it - finally Friday!!! :):):):)
Those dells if you remove the cmos battery, you have to try to power a few times and it takes maybe 30 seconds to display a image.
Great Job tracking the problem, but how did you chose the replacement cap? no marking no schematic, just any cap will do or what? what is the trick in selecting replacement smd caps?
Thank you for sharing sir new supporters here
A lot of business laptops used to be built this way, with components like RAM, the WiFi card and hard disk being easily accessible, but for taking out the motherboard or CPU fan one would have to take the whole laptop apart.
Dell on its website provides the service manual for each of its laptops, to find it just search on Google for the "laptop name + manual", in my opinion you spend less time consulting it rather than improvising the disassembly, also with the manual there are less risks of damaging the laptop
*Very Good Boris*
GOD Bless U Man
What is the strip in the middle top of the bottom of the PC with the two indications on the both sides of it??
Thanks sorin
Sorin Come to Besiktas and teach us how to make needle probs pls...
many thanks, sir.
What's that fluid that gets poured onto the motherboard chips ? Water ?
Flux dude. 😄
Nice job. New interesting lesson.
_"You get what you pay for."_ ... Except if you buy a Range Rover, for example: _expensive_ AND _unreliable_ -like quite a few other 'prestige' luxury items, besides (including Macs, imo, assuming Rossmann's repair videos provide a good indication; ex: corrosion issues)! I think the 'you get what you pay for' idiom is more true for necessities (i.e. stuff you actually need), but rarely-if maybe ever-for stuff you desire (things you don't need, but are often suckered into desiring anyway, especially high-status items with perceived symbolic value). _"Value is paying for what you need, not what [you think] you desire",_ is how I would put it.
Does the value of a replacement capacitor matter?
yes
just a quick question,.,..,,.when you set you power supply to 19v...do you set up the amps also..or how do you know how much amps is there already when you inject the 19v ,,or you tuen the amps very low before you inject 19v..thanks
It was a nice video as before thanks!
How do we know if this cap we soldered is same farrad which we removed one ?
Thank you for the video!
You are so good, thank's a lot for sharing. By the way i have a presario compaq cq60, external screen works but not internal screen. i did change the screen wire that goes from the laptop to the screen. the converter and the screen and still no internal image. so would it be a motherboard problem? LVDS line or voltage? My 3.3 volts is on tthe screen plug, my 19 volts goes on the plug too and 5 volts i think i saw too i'm not sure is also on the internal plug. External screen works fine. So, since it's not the graphic chip, what do you think i should check? You are the only one i trust to help me. Hoping for an answer. Thank's sorin. Best regards. Serge.
It was the graphic chip cause i did order another board and it works good lol!
proper hard to disassemble thx boss
Great repair!
Your a Gosu Tech sir! Hats off! how about dell e5450 no power and display?
Got a similar fault, did you manage to fix it ? What was it ?
Hi Master , why the cap didn't get very hot despite of that it got about 3.5Amp it must get hot too much
Very good movie
How did you know what capacitor use ?
Sometimes you only remove the capacitor sometimes add new why ?
Sorin: I have an e7470 which does not charge. I find out that the center pin (the one that determines the charger type) is grounded/shorted. Do you have the wiring diagram of this board or do you know where I can find it? Thank you.
I have just solved a non charging issue with a e7470. I'm writing just to summarize what I found for others.
1. Check charger and center pin.
2. DC adapter port might have a broken wire
3. Mother board might have a bad chip (I had a broken diode PD6 5V: Digikey: 1727-3936-1-ND)
I have circuit diagram if anybody needs.
@@uccoskun e5450 and e5440 schematics please?
@@ivar130 I could not find any schematics, I found the problem just by inspecting the board.
you are just awesome
Perfect...You are awesome idol...👏👏
Mr. Sorin: _"I have to remove the screen; because, the hinge, it's over the motherboard. It's a crazy design. . . .So, everything is removed and the motherboard should come out easily, which is not happening-for some reason."_ ...Yep! The disassembly of these Dell Latitude-"Attitude"-laptops is awful: you need to take EVERYTHING apart to get to the motherboard! Misery. I just finished one (E5410), and it took _like_ 2 hours to carefully disassemble and reassemble the f***ing thing; and I still wound up with a "bonus" screw! I even dreamed this morning of finding where the extra screw was supposed to go! PTSD. Next time, I'll try Paul Daniels' technique of using a 15-compartments pillbox to keep track of roughly where each screw comes from, with respect to the laptop's overall layout; Sorin's expert approach of confidently shoving them to the side doesn't work for me! Hehehe. One good thing, though, the online Dell service manual gives _very detailed_ step-by-step instructions-with photos-on how to do the disassembly. Also, the electronics hardware looks pretty solid and full-featured, and I also like their 3 diagnostic LEDs setup (if you've got power).
i forgot the series, i got one at the moment, remove everything just for upgrade memory lol
Sir your tester is connected in the computer?
hi sorin my name is george and i wanted to ask you if you can help me. my neighbor has a laptop dell e5450 zam 70 rev 1. i opened the laptop and i noticed that pq4 was all burned out so i tried to figure out which is the fault and i found some shorted capacitors near pq705, i removed the damaged one and bridged pq4. I tried the laptop half disassembled and it seems to go. my neighbor has two children who now need a laptop to study and I'm afraid they'll get hurt. Can you tell me what this pq4 does and if it is dangerous to leave the jumper without mounting another same component and its capacitor, thanks in advance and apologize for my english i am using google translate
Hello fixer/teacher.I have asus laptop and it is charging but when i push power button nothing happen.What could be wrong,shorted?Thanks for answer.
from egypt thanks alot
When I plug in the charger to my laptop and press the power button,laptop fan and lights on for few second then dies..press the power button again and nothing happens..I found out that the lm358a ic gets warm when I plug in the charger..is it the cause? And can I use a lm358/ lm358p instead?
Hi
Firstly thanks for all videos
I learn many things and resolve many computer by following your steps.
But now i have a problem with fujitsu li 3910
When it reach 26% become (plugin ,not charging) .problem is when i remove battery the laptop couldn’t turn on with power ic only.battery should be in. I tried with another charger, but still same problem.
Can you guide me pleas?thanx in advance.
This was really interesting. Thunderfoot here on youtube said that the film was not accurate because the explosion couldn't be that big what they described. That was an interesting video as well.
thank you Mr
Hi,
Help!!!!Please!
Main 19.5V line is shorted but when power applied nothing gets warm/hot?
Voltage drops to 1.2 amp is 5
Any ideas?
Many Thanks
You can use alcohol. Pour alcohol on the board AND TURN ON THE POWER SUPPLY. tHE PLACE WHERE ALCOHOL EVAPORATES FASTEST IS THE SHORT.
Have the same problem with my Dell E5450. Do you fix laptops?
Wife and I are watching Chernobyl on HBO. Its really good! What a freakin mess!
Hi..I need help of my sony vaio Sve15124cxs..recently i have problem the machine wont turn on...when i press power button the battery icon and the startup led indicator just blinking...then i trided this method..
Remove the battery and charger
Then hold up power for 1 minutes
After that insert battery and plug the charger it turn on and works fine untill it shut down..but when i restart the machine ot turn on and after 1 to 2 min it shut down automatically...and wont turn on again...
Why its happen..pliz help
Rather then i remove the motherboard and clean all dust and reaasemble everything then when i power up nothing happen..after a few minutes..when i power on it turn on and use about 12 hrs..but when i restart the device it won't start and only green light appears for a second and turn off again..in a word it sometimes turn on sometimes not..what is the issue..?? Thnx
Thats easy, replace power supply
@@Crazy--Clown bro i dont think the power supply fault..bcs the problem remain when using only battery..and the battery health shows good
@@mushfiqultusher756 *Fake News*
I remember that period too , no wide leaf vegetables like spinach no mushrooms and for the following years no cigarettes , the worst known nuclear accident
Your carbon resistors seems to be coils
Hi! after doing a repaste on my DEll G2 3590 I got no charging led no fan spin. The first time I tried to power it on I saw the charging port led blinking white, but only once it was too fast for me to see the pattern. Tried Taking out the Bios coin battery, disconnecting the main battery and holding power for a couple of minutes. I checked voltage from charger and from battery and both are good even plugged to laptop I do not see any voltage drops. Does any one has an advice of what I am doing wrong? now I ill just connect to the charger for a couple of hours that the battery was completely dead. Help! I am running out of ideas.
Thanks for your teaching, please help me l am a computer technician, l have a challenge on dell Latitude 5490 not charging, not powering on with DC adapter but powering on with batter. I would be very glad to have your help on this issue thanks for ur cooperation
@1:15:11 - HDD screws are not in.
Are you from Făgăraș, România ?
Da :)
@@electronicsrepairschool Sorin Electronics?? :))
Iti dau subscribe :))
Da :) a fost odata sorin electronics :) Frumoase amintiri...
Best thing about Dell computers is that they provide full featured detailed disassembly manuals for all their laptops.
Free of charge which Ive loved about them since forever.
For example here's how to remove the keyboard on that specific model.
www.dell.com/support/manuals/us/en/19/latitude-e5250-laptop/dell_latitude_e5250_bdw/removing-the-keyboard?guid=guid-dbcdd0d6-5888-4d1e-ac3b-6737a2070bf6&lang=en-us
Hello,
can you please help me. I have dell latitude e5570.
does not charge Battery unknown charger in bios.
I tried different original charger all the same problem.
in bios test battery is excellent.
if i put the dc jack in for only 3 seconds white light then off.
greeting
Impressive...I really like the mention of 'crazy design.' Designers need to do better. How many thousands of these have simply had 'techs' replace the motherboards? I wish more people did actual repairs, very rare, and unfortunate.
how do you know if the F of the capacitor is the same?
I like your watch:), can you say model it? good job, another nice solution video👍
Very good
youcan test motherboard by using hdmi cable and without loose time by replacing it in laptop.
Termocamera for your iPhone is "FLIR One Pro Gen 3 - IOS". !!!
You upload the second video first. This is the first video tho. Maybe youtube just finish rendering this video.
Hello sir. Do you help me. I have dell 7250 ac adapter unknow. . Pleasee help me sit
HI , did you had a problem with a BIOS chips on these DELLs ?
Chernobyl - very good one , Russian media is pissed off big time for showing all this :D
I have these Dells very often with bad boards and send them for repair every other month.
My dell laptop was charged with a reverse polarity and heard an explosion pls can you suggest me with a solution to the problem.
I will be very happy if you could help pls.
Thanks my guru
When I was little, I also got iodine to drink after the Chernobyl cloud, I was in the 7th grade at the time. Poland is close. I understand what you mean when they lie to people.
Ha Sorin,
You can save your time and buy a thermal camera.
Cheers
Miał może ktoś taki przypadek że laptop się włączał i był czarny ekran i tylko jedna kreską i wie co mogło się stać ten sam model laptop
Lub jak zrobić reset bez właczania
❤👍Super ❤ 👍
35:38 Yes! you should invest in a thermal camera👍🏻 That should speed up your speed or detecting the hotspot! Worth every dollar😋
Dell Inspiration 15 repair....post video 🙏