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Motherboard Repair

By on June 23, 2008

 pc motherboard

I had stopped repairing PC motherboard  since i left my former computer distributor company back in 1994. Those days the famous motherboard board were the 486sx, 486dx and the Pentium. I was provided with every model of the motherboard schematic diagrams,  Chipset (all range of IC’s), SMD desoldering tools, troubleshooting notes and even the POST diagnostic card. Repairing PC motherboards on those days were quite easy but i doubt nowadays it will be easy unless you are working in the motherboard manufacturers or you have the sources for all kind information related to motherboard.

Occasionally i do have motherboard sent for repair by my friend who deal with selling computer systems. Most of the time was the electrolytic capacitors bulged and quite simple to fix it. Nowadays PC motherboard is quite cheap and less people want to repair it and prefer to buy a new board unless if the motherboard is in the higher range (branded). As mentioned, if you can’t source for the parts it would be very difficult to repair the board. Those days the boards were only using normal SMD IC’s (spider IC’s) but most of the motherboard now are using the BGA IC’s which is very difficult to extract unless you have the special equipment to do the job.

It will be very time consuming to do this precision job unless the profit that you gonna make could cover your cost otherwise it would not be economical to repair the motherboard. If any of the readers in my blog repair motherboard i would like to listen to what you have to say about motherboard repairing business-thanks 



  1. Subhendu Roy

    March 27, 2015 at 4:27 pm

    Hi Jestine,
    I find many capacitors are bulged in the motherboard which are 820uf, 680uf and so on. These value of the capacitors are not available in the market. Can I replace those with 1000uf and 470uf accordingly ?

    • Jestine Yong

      March 27, 2015 at 7:59 pm

      Hi Subhendu,

      Replace with a bigger microfarad like the 1000uf is a better choice.


      • venkatesh

        July 2, 2015 at 8:30 pm

        replacing with larger value capacitors cause more charge to flow & current to preceding circuit making it to malfunction & even may destroy the working circuit.I wanted a testing method of Transit voltage suppressor (TVS) diode used in hardisk drives & its equivalent diode.

  2. Raj

    April 29, 2015 at 8:51 am

    Can you help me to find casio slot machine power supply. The company 3Y power supply and SEATECH.

    • Jestine Yong

      April 30, 2015 at 12:45 pm

      HI RAJ,

      Sorry i do not have info on this.


  3. parus

    April 27, 2016 at 11:18 am

    i enjoy your article. see what useful and share to anyone but not forget it came from you, justine.

  4. carlos martinez

    October 5, 2017 at 5:52 am

    hi mr. jesting, i'm glad to write you, i'm technician but i work wide range of equipment, crt, lcd, motherboard, security cameras, audio, etc, and my first trouble in motherboard is the hard find schematic, some cand find but others no, but almost, intel chipset and via chipset is very similar in architecture, so, maybe a ebook like smps can be made?

    • Jestine Yong

      October 6, 2017 at 3:11 pm

      Hi Carlos,
      You can try to look for schematic. As for the SMPS repair ebook you can visit


  5. Greg2002

    February 6, 2018 at 11:51 am

    I'm about to attempt to replace 2 USB ports on my Toshiba laptop motherboard. These are the 3.0 soldered to the board. I have the tools, and should be able to accomplish the task. I received the USB ports today from China, I see the 3.0 ports have 9 pins. Anyone have experience replacing these ?

  6. Trey

    September 8, 2019 at 12:08 am

    Your style is really unique compared to other people I've
    read stuff from. Thank you for posting when you've got
    the opportunity, Guess I'll just book mark this page.


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