Repairing Computer Motherboard

By on December 28, 2009

CPU MOTHERBOARD

I got a good blog post by Ranotosh on Computer motherboard repair. Here is the tips:

First of all thanks for your website,it is very useful for persons who are in the electronics field. I am a electronics hobbiest from kolkata(india). I want to share my experiences in motherboard repairing with the readers of your blog.

1. Check for any physical damage in the board i.e. burnt out parts,inflated (bulged) electrolytic capacitors,damaged tracks, burnt out ram slot,cracked chips etc.

2.In many cases SMPS stops in few seconds after power on,this is a indication of a short circuit in the motherboard. In most cases FET in the voltage regulation circuit get shorted.one can check with a multimeter for any shorted FET. Sometimes chips may get shorted, in that case one has to forcefully power on SMPS by shorting green and black wire of SMPS and look for any overheated chips.

3. Replace the bios from a similar motherboard.

These are the few basic techniques of chip level motherboard repair.

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216 Comments

  1. admin

    May 9, 2011 at 4:24 am

    HI Amit,

    You need the smd and bga rework station.

    Jestine

    Likes(0)Dislikes(0)
  2. Xander

    May 17, 2011 at 6:06 pm

    I am having another motherboard issue and wanted to know is you might have any ideas about it. I was replacing the northbridge heatsink on a dell dimension 2400 motherboard, a highly modified one. The heatsink on it was really stuck and then snapped off but it seemed like it was almost cooked on. It didn't seem like anything got hurt from it coming off but when I finished building the PC the video didn't work and when I use a seperate video card the same happens. I checked the monitor on another pc and its fine. The motherboard turns on fine and the normal post beep happens but I am not getting any video just a black screen is it possible to replace a northbridge chip or is it possible the northbridge is not working just from switching heatsinks? The computer runs and the post beep is normal. I am at a loss on this one. Any ideas of how to fix this one ?

    Likes(0)Dislikes(0)
  3. admin

    May 20, 2011 at 12:22 am

    HI Xander,

    Actually the best to repair motherboard is to use the POST card at least you will know which part of the IC that need to be replaced. In your case above, sorry i can't confirm if the northbridge ic have problem or not.

    Try check out this link:

    http://www.pc-diagnostics.com/pc_diagnostics_tools/flippost_isa_pci_bus.shtml

    Jestine

    Likes(0)Dislikes(0)
  4. ajay kumar

    May 22, 2011 at 2:01 am

    very good

    Likes(0)Dislikes(0)
  5. srinivas

    June 11, 2011 at 6:58 am

    hi,

    where i can learn motherboard,smps,hdd repair in banglore plz help me i am interested on this field 🙂

    Likes(0)Dislikes(0)
  6. admin

    June 11, 2011 at 10:59 am

    HI Srinivas,

    Sorry no info on that.

    Jestine

    Likes(0)Dislikes(0)
  7. service komputer

    June 11, 2011 at 3:39 pm

    thank you, this tutorial is very useful and helping me. btw i send you a message in your facebook account. 🙂

    Likes(0)Dislikes(0)
  8. admin

    June 12, 2011 at 12:21 pm

    Hi Lukman,

    You are welcome.

    Jestine

    Likes(0)Dislikes(0)
  9. admin

    June 15, 2011 at 7:44 am

    HI Samuel,

    From your description it seems like the motherboard problem. Here is the link of a US laptop repairer:

    http://www.jestineyong.com/?p=3512

    Jestine

    Likes(0)Dislikes(0)
  10. katende najiibu

    July 16, 2011 at 8:47 am

    apart from the VGA what else can make a motherboard fail to display

    Likes(0)Dislikes(0)
  11. admin

    July 16, 2011 at 7:07 pm

    HI Katende,
    A fail power supply, shorted components, bad crystal, bad Cpu, Nothrbridge IC and etc.

    Jestine

    Likes(0)Dislikes(0)
  12. sachin

    July 28, 2011 at 6:08 am

    hi
    what are the motherboard error checker tool
    sachin

    Likes(0)Dislikes(0)
  13. admin

    July 28, 2011 at 6:46 am

    HI Sachin,

    http://www.pc-diagnostics.com/pc_diagnostics_tools/flippost_isa_pci_bus.shtml

    Jestine

    Likes(0)Dislikes(0)
  14. Prakash Gaikwad

    August 11, 2011 at 3:07 am

    i have 845g gigabite motherboard.
    i want mospit on mother bord

    Likes(0)Dislikes(0)
  15. admin

    August 11, 2011 at 10:00 am

    Hi Prakash,

    Sorry i do not have the parts

    Jestine

    Likes(0)Dislikes(0)
  16. ajay sharma

    August 12, 2011 at 11:45 pm

    this is very good and i amableto know and find the fault of the computer which are come in the comoputer motherbord

    Likes(0)Dislikes(0)
  17. ajay sharma

    August 12, 2011 at 11:48 pm

    sir tell me how to remove the bad cluster form the hard disk . there are many bad cluster in my hard disk and it can switch off rendomelly. so tell me the soluation ....

    Likes(0)Dislikes(0)
  18. admin

    August 13, 2011 at 1:00 am

    HI Ajay,

    Sorry no info about removing bad cluster.

    Jestine

    Likes(0)Dislikes(0)
  19. Gobinda Pathak

    August 23, 2011 at 4:10 am

    I like ur tips... How i know further...

    Likes(0)Dislikes(0)
  20. vijaysathyan

    September 7, 2011 at 12:56 am

    HI,How to find out the no display problem and how to rectify it by chip level servicing

    Likes(0)Dislikes(0)
  21. haitham hashim

    September 11, 2011 at 12:20 pm

    hi every one,i like to learn how repair any board,what the advice from you to me,you are expert in electronic,thanks eng haitham hashim

    Likes(0)Dislikes(0)
  22. admin

    September 12, 2011 at 4:51 am

    HI Haitham,

    Sorry i do not have book on motherboard repair. If you are just starting out in the repair field i suggest that you get the Testing Electronic Components ebook first( http://www.testingelectroniccomponenhts.com ). Once you are good in testing electronic components in fact you can start the repair work.

    Jestine

    Likes(0)Dislikes(0)
  23. Gad

    September 20, 2011 at 11:50 pm

    I want learn fixing and troubleshooting motherboard

    Likes(0)Dislikes(0)
  24. anwaralam

    September 25, 2011 at 5:19 am

    in the murcury after shutdown cpu fan is working properly

    Likes(0)Dislikes(0)
  25. JAMES MULINDWA

    October 1, 2011 at 6:26 pm

    am a computer techician in LUWERO (UGANDA).PLAESE FOR ANY ENLIHGT TOWARDS TO BECOME A PROFFESIONAL CIRCUIT REPAIR TECHINICIAN.Please teach me on email jimmulindwa@yahoo.com. I experienced challenge on the board,it beeps even on working memories inserted for search boards.

    Likes(0)Dislikes(0)
  26. javid suriya

    October 2, 2011 at 7:20 am

    where i found motherboard chip level repair tips free

    Likes(0)Dislikes(0)
  27. shailendra

    October 2, 2011 at 8:14 am

    when m/b no display what what about checking

    Likes(0)Dislikes(0)
  28. admin

    October 3, 2011 at 2:30 am

    HI James,
    If you want to be good in circuit board repair then you need to get my ebook on Testing Electronic Component at http://www.testingelectroniccomponents.com . once you are good in testing electronic components, in fact you can start to repair circuit board. To further advance your repair skill then you may need to find another book that suit to your field of repair.

    Jestine

    Likes(0)Dislikes(0)
  29. mazumdarmilan

    October 20, 2011 at 4:58 pm

    i accept this website

    Likes(0)Dislikes(0)
  30. yasin

    October 29, 2011 at 6:48 am

    your approach is very interesting

    Likes(0)Dislikes(0)
  31. Fouad

    November 20, 2011 at 4:36 pm

    hi,
    Im interested in learning laptop motherboard chipset level repair. Im wondering if I could get the books on above stated subject or the course is available online. If there was, how much that will cose me in Doha Qatar along with the shipment. also explain me about payment method.

    Thanking you in anticipatio.
    Sincerely.

    Likes(0)Dislikes(0)
  32. admin

    November 21, 2011 at 8:27 am

    Hi Fuoad,

    Sorry i do not have the ebook.

    Jestine

    Likes(0)Dislikes(0)
  33. mohammad ajij rehaman

    December 8, 2011 at 6:22 am

    r/s i aziz rehaman computer chip leval service engeneer. i have problems with spare parts pls i need your help . where available , thank you

    Likes(0)Dislikes(0)
  34. admin

    December 11, 2011 at 8:18 am

    Hi Mohammad,

    Sorry we do not sell spare parts

    Jestine

    Likes(0)Dislikes(0)
  35. Alok

    January 21, 2012 at 4:39 am

    Hi Jestine,

    My SMPS displays proper SB voltage(+5v) but when i short the Green and Black Wire then all the output voltages are fluctuating but below their normal voltage. (Say +5v will fluctuate between 1v to 4v. Same goes for all other colors). Also then the SB voltage fluctuates. But when i remove the pin between green and black then SB voltage is back to normal(+5v) without fluctuation.

    The filter caps display the reading of approx 280-290v when i checked it in power-on after shorting the green and black pin.

    Can you please suggest where can the problem be?

    Likes(0)Dislikes(0)
  36. admin

    January 22, 2012 at 8:30 am

    HI Alok,

    Two things yo need to check:

    1) make sure you connect to a load (motherboard)

    2) check all the output filter caps in the power supply with esr meter.

    Jestine

    Likes(0)Dislikes(0)
  37. dhanraj

    January 22, 2012 at 5:53 pm

    pls tell me the price of motherboard repairing book

    Likes(0)Dislikes(0)
  38. admin

    January 23, 2012 at 8:31 am

    HI Dhanraj,

    Sorry we do not have motherboard repairing book.

    Jestine

    Likes(0)Dislikes(0)
  39. Shailesh

    February 2, 2012 at 2:17 pm

    Hi Jestine

    I have one panel PC P$ mother board. When I swith it on, there in no power, no fan rotation, nothing.

    The +5 VSB is fine and I checked power supply shorting the Green and Black wire. The power supply outputs perfact voltages.

    A small green LED on the Mother board lits, which I think shows the presence of the +5VSB.

    I checked the pin 72 of Winbond 83627HG Controller, It must be low when I power on the pc, but it stays high. thats why the power supply not get on.

    What will be the cause.

    Thanks and waiting for your reply.

    Shailesh

    Likes(0)Dislikes(0)
  40. admin

    February 5, 2012 at 3:53 pm

    HI Shailesh,
    Actually very hard to determine where the problem is without using the PC Post card. During my time I depends heavily on the PC post card because it could tells you which section is having problem. In your case, it could be any component from bad CPU till power supply. Having good 5 volt and other voltages does not mean the power good signal is good. Without power good signal the motherboard will not work.

    Jestine

    Likes(0)Dislikes(0)
  41. janaka

    February 11, 2012 at 2:31 pm

    how to replace bios.some bios are in on board.is it possible to remove cmos battery

    Likes(0)Dislikes(0)
  42. admin

    February 13, 2012 at 8:06 pm

    HI Janaka,

    If it is on board then you need a rework station to remove it.

    Jestine

    Likes(0)Dislikes(0)
  43. Ikram

    March 11, 2012 at 11:18 am

    Hi,
    I have TOSHIBA laptop and its working fine since 4 years. But one day suddenly power failure, i am unable to switched ON. Its completely dead. Even i have tried with removing battery and direct connect on power. All the things i have tried from my end. Then i have shown to one of the technician in Hyderabad(India), he shown me its power capacitor has gone. That is NEC/TOKIN capacitor damaged.
    Please let me know how much toshiba service center will charge for this, i have handed over the laptop to the service station.

    Pls reply me....

    Likes(0)Dislikes(0)
    • Jestine Yong

      March 14, 2012 at 8:52 am

      HI Ikram,

      Sorry i have no info on this because I do not repair laptops.

      Jestine

      Likes(0)Dislikes(0)
  44. Russ

    March 24, 2012 at 10:53 pm

    I bought this book from Amazon for the Kindle.

    Laptop Motherboard Fault Finder [Kindle Edition]
    Nkechi Emeka

    http://www.amazon.com/Laptop-Motherboard-Fault-Finder-ebook/dp/B005I7HM9M/ref=sr_1_1?ie=UTF8&qid=1332557238&sr=8-1

    It is about 200 pages of what looks like questions and answers from a forum on Laptop motherboard repair. It does have some good info in it and anyone working on laptops would find this helpful because there are few sources of info available like this. It is written in broken English and there are not a lot of deeper explanations on the problems and solutions. It is only $9.95 and you can download it. The info is fairly current, maybe 2011. You can check out the some of the book for free on Amazon.
    Russ

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    • Jestine Yong

      March 24, 2012 at 11:10 pm

      HI Russ,

      Thanks for the update.

      Jestine

      Likes(0)Dislikes(0)
  45. mohsin

    April 4, 2012 at 5:03 am

    pls i want motherboard repairing ebook total solution, can you halp me?

    Likes(0)Dislikes(0)
    • Jestine Yong

      April 5, 2012 at 1:51 am

      HI Moshin,

      Sorry I do not have motherboard repairing ebook.

      Jestine

      Likes(0)Dislikes(0)
  46. mohsin

    April 10, 2012 at 5:10 am

    any help? motherboard releted 

    Likes(0)Dislikes(0)
  47. Mezachi

    May 15, 2012 at 10:37 pm

    Hi Jestine,
    I am an IT technician with over 13 years of experience completing a wide variety of laptop and desktop repairs.  Our company is looking to get the proper equipment for doing component level testing on motherboards (laptops & desktops mainly).  From the research completed so far, it appears that we need  a high quality oscilloscope, Rework Station, SMB station ESR tester.  The rework/ reballing stations will be fairly easy to use with our experienced techs, however using a oscilloscope to complete the component level repairs / finding the problem part(s) will be difficult.  Do you have any books / materials that you would recommend for purchasing?  We are happy to pay for any ebooks etc. provided the material is of use to proceed with this.  Thank you for your time.

    Likes(0)Dislikes(0)
    • Jestine Yong

      May 16, 2012 at 2:23 am

      Hi Mezachi,

      Sorry i do not have any ebook on this. Perhaps you need to check from the owner of this website:

      http://www.howardelectronics.com/

      Jestine

      Likes(0)Dislikes(0)
  48. BHANU TIWARI

    June 7, 2012 at 10:41 pm

    DEAR SIR YOU HAVE MOTHER BOARD AND LAPTOP CHIP REPAIRING BOOKS WITH BEST TIPS ON THAT
    THANKS 
    BHANU
     

    Likes(0)Dislikes(0)
    • Jestine Yong

      June 12, 2012 at 7:54 am

      HI Bhanu,

      Sorry I do not have motherboard repairing book. As for Laptop you can click on the banner on top of the header to learn about laptop motherboard repair.

      Jestine

      Likes(0)Dislikes(0)
  49. m. saiful islam

    June 18, 2012 at 12:50 pm

    very helpful , recently i changed my computer motherboard . now i am thinking may be it was repairable

    Likes(0)Dislikes(0)
  50. C.Workman

    June 26, 2012 at 3:47 pm

    this may sound silly, but a question on camera's, can someone point me in a good direction on a camera/ microscope that is not to expensive with the ability to connect to a computer so that i can inspect electronic parts without having to fight a magnifiying glass preferably one on a stand that i can aim over a board , and see the joints, wiring etc.   my eyes are not what they used to be and i need all the help i can get , thanks
     
    C.W.

    Likes(0)Dislikes(0)
    • Jestine Yong

      June 27, 2012 at 5:26 am

      Hi CW,

      Try this link:

      http://www.microscope-shop.com.au/ProductDetails.aspx?Model=USB%20Microscopes:TLI%20USB%20Scope%202MP

      Jestine

      Likes(0)Dislikes(0)

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