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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Likes(21)Dislikes(2)

216 Comments

  1. saiful ismail

    July 7, 2012 at 3:09 am

    my pc shutdowns after every 10mins. I was changed the SMPS but problem remains. I think there is a problem with my motherboard. plz help

    Likes(1)Dislikes(2)
    • Jestine Yong

      July 7, 2012 at 7:45 am

      HI Saiful,

      It could be the bad e-cps problem. Try look at the board to see if there is any bulged e-caps.

      Jestine

      Likes(2)Dislikes(1)
      • balaji

        November 17, 2014 at 10:55 am

        Sir in my motherboard processor fan running but not. Coming display so I check all the fet in vrm section but. That time I see 6 fet short so I remove one fet but that short in same fet. Place in mboard so wt Will I do sir pls help me sir

        Likes(1)Dislikes(5)
  2. Siddanth Sawant

    July 10, 2012 at 5:05 am

     
    when i start my CPU my motherboard gives a pip pip pip pip......... sound and there is nothing of mointer. what is the problem with the motherboard?

    Likes(2)Dislikes(1)
    • Jestine Yong

      July 10, 2012 at 7:55 am

      HI Siddanth,

      It could be motherboard or the power supply problem. Assuming is the motherboard problem it can be bad e-caps or failure in one of the IC. You need a PC post card to find out the location of the faulty section.

      Jestine

      Likes(3)Dislikes(1)
  3. Siddanth Sawant

    July 13, 2012 at 9:27 am

    putting an new garphic card is there any installation process in the pc 

    Likes(1)Dislikes(0)
    • Jestine Yong

      July 13, 2012 at 9:05 pm

      Hi Siddanth,

      Usually is auto detect once you have slot in the card.

      jestine

      Likes(3)Dislikes(0)
  4. Siddanth Sawant

    July 16, 2012 at 1:30 am

    i am having an new 2nd gengeration intel i3 processer which motherboard is perfect for the i3 processer

    Likes(0)Dislikes(0)
    • Jestine Yong

      July 16, 2012 at 9:42 pm

      Hi Siddanth,

      Sorry no info on this as I no longer in this board repair field. You may need to check form those who sell the motherboard or computers.

      jestine

      Likes(1)Dislikes(0)
      • lite

        April 20, 2014 at 10:01 pm

        clean with vacum the pci e &ram slot
        check your memory

        Likes(1)Dislikes(1)
  5. Rohan

    July 17, 2012 at 11:51 am

    any company graphic card works for any type of pc whether it is new or old

    Likes(1)Dislikes(0)
    • Jestine Yong

      July 17, 2012 at 9:31 pm

      Hi Rohan,

      Generally yes all card should be able to support any type of motherboard. However i have seen some card that can't run on high resolution but low resolution working fine.

      Jestine

      Likes(2)Dislikes(0)
  6. Jansen Philip L Ventura

    July 21, 2012 at 7:42 am

    The symptom of my motherboard is that when i turn it on, it will turn on but in a split second it shuts down again like it has a short circuit..

    Likes(0)Dislikes(0)
    • Jestine Yong

      July 21, 2012 at 11:50 pm

      Hi Jansen,

      Check if there is any bulged e-caps on motherboard or not. Make sure the ATX power supply is good.

      Jestine

      Likes(0)Dislikes(0)
  7. hairus

    July 29, 2012 at 3:49 am

    hi jestine..
    just to now how tackle the problem when to repair power supply unit like UPS,BMR(for spindle motor) or others electronic circuit. For your info, I'm new guy in this field. Ned your help to guide me.

    Likes(1)Dislikes(0)
    • Jestine Yong

      July 30, 2012 at 10:02 pm

      Hi Hairus,

      When to repair the UPS and spindle motor? If the set have problem then you start to repair it. UPS common fault is battery problem or even eeprom ic have corrupted. As for the spindle motor check the resistance of the spindle motor as a weak spindle motor have high resistance and will affect the overall RPM.

      Jestine

      Likes(0)Dislikes(0)
    • gagankalwa

      April 26, 2015 at 10:35 pm

      hello
      i wanna learn online pc motherboard repair and of laptop (chip level programming).Can u plzz help?

      Likes(0)Dislikes(0)
      • Jestine Yong

        April 27, 2015 at 7:16 am

        Hi Gagankalwa,

        I suggest that you visit this link to search under Laptop repair for beginners for more information.

        Jestine

        Likes(1)Dislikes(0)
  8. I like U

    July 30, 2012 at 9:53 pm

    Sir, Lap wipro board not getting hdd but in bios showing hdd is there I tried different hdd but same. chip also chip also reballed but same. Is it bios problem or not

    Likes(2)Dislikes(0)
    • Jestine Yong

      July 30, 2012 at 10:27 pm

      Not sure because I have no info on this.

      Jestine

      Likes(0)Dislikes(0)
  9. vivek

    July 31, 2012 at 11:36 am

    hello
      i wanna learn online pc motherboard repair and of laptop (chip level programming).Can u plzz help?
     

    Likes(0)Dislikes(0)
    • Jestine Yong

      August 1, 2012 at 10:12 pm

      Hi Vivek,

      Sorry i do not have those courses.

      Jestine

      Likes(0)Dislikes(0)
  10. Ron

    August 6, 2012 at 7:46 am

     
    My motherboard is ECS H61H2-M2 with i3 processer will this (HIS AMD/ATI Radeon HD 5450 1 GB DDR3 Graphics Card) will support my pc.

    Likes(0)Dislikes(0)
    • Jestine Yong

      August 7, 2012 at 7:15 am

      HI Ron,

      Sorry I have no info on this. Try check on any pc forum.

      Jestine

      Likes(0)Dislikes(0)
  11. Mr. Jansen Philip L Ventura Plz check VRM Section Uper Mosfet of your motherboard. one of this mosfet is short so fan run and stop thats all. Check it and replace with same mosfet your motherboard will run again.

    Likes(1)Dislikes(0)
    • angelo

      November 22, 2016 at 9:34 am

      Hello sir
      My foxconn mobo has an issue of restarting
      After each half or one hour
      All the ecaps look good rams also have bn replaced
      Bt stil issue persists.
      Plzzzz help

      Likes(0)Dislikes(0)
  12. I like U  plz cehek your WIPRO Laptop motherboard bios setings of SATA mode. I m thinking u r trying to install XP if it is true then try withe windows 7 coz your XP disk is no SATA Driver for this motherboard to detect hdd. 

    Likes(1)Dislikes(0)
  13. Jose

    August 25, 2012 at 2:04 pm

    What is SMPS,  I don't have any idea what it is? He doesn't explain

    Likes(0)Dislikes(0)
    • Jestine Yong

      August 25, 2012 at 8:40 pm

      Hi jose,

      SMPS means switch mode power supplies.

      Jestine

      Likes(2)Dislikes(0)
  14. Rahul

    September 5, 2012 at 10:19 am

    some processer have pins and some do not have,do any processer if it has pins or not it fits to any motherboard or there are any different motherboards for pinless or pin processor

    Likes(0)Dislikes(0)
    • Jestine Yong

      September 6, 2012 at 3:50 am

      Hi Rahul,

      They actually have pins but you can't see it. It was all underneath and is called as BGA IC.

      Jestine

      Likes(0)Dislikes(0)
  15. Rubel

    September 8, 2012 at 3:00 pm

    Hey Jestine sir,
     
    A problem with my motheroard is that ,when i insert the ram it does'nt giv any error beep...but it does'nt boot
    or no bios screen appears but without the ram inserted, it gives the error beep....confused ..can u plz help???
     

    Likes(0)Dislikes(0)
    • Jestine Yong

      September 9, 2012 at 4:08 am

      Hi Rubel,

      In such cases it is hard to detect unless if you have the PC Post Card. Before that make sure the ram is working and support your type of board.

      Jestine

      Likes(0)Dislikes(0)
  16. amit

    September 8, 2012 at 11:56 pm

    sir i have hp amd press power button not start plz sir help how to repair smps on motherboard

    Likes(0)Dislikes(0)
    • Jestine Yong

      September 10, 2012 at 8:19 pm

      Hi Amit,

      Have you check the fuse and components inside the power supply?

      Jestine

      Likes(0)Dislikes(0)
  17. Rubel

    September 9, 2012 at 5:51 am

    Hey Jestine sir,
    Thankyou for your precious feedback...Ihave tested the ram several times and infact I have tested it with a new one, but is the same..I think its hardware components related problem...And Also I had to ask you is it possible to detect such kind of problems with a pc post card??
    Rubel

    Likes(0)Dislikes(0)
    • Jestine Yong

      September 10, 2012 at 8:24 pm

      Hi Rubel,
      With post card at least you know which section is having problem so that you do not need to waste time on another section.

      Jestine

      Likes(0)Dislikes(0)
  18. partik

    September 15, 2012 at 1:10 pm

    sir 
    on my MB no display and no error in pcpost card 

    Likes(0)Dislikes(0)
    • Jestine Yong

      September 18, 2012 at 8:36 am

      Hi Partik,

      Do you mean it passes the PC Post card test?

      Jestine

      Likes(0)Dislikes(0)
  19. Sanjay Singh

    October 14, 2012 at 3:11 am

    My motherboard is powering on than power cabling with SMPS without power pin short.
    But no display any reporting. No weep nose.

    Likes(0)Dislikes(2)
    • Jestine Yong

      October 15, 2012 at 9:07 pm

      Hi Sanjay,

      Have you replaced with a good smps and retest?

      Jestine

      Likes(0)Dislikes(0)
  20. sunny

    October 23, 2012 at 6:32 am

    hello sir ,
    how can repair vertical line in lcd monitor plz help

    Likes(0)Dislikes(0)
    • Jestine Yong

      October 23, 2012 at 7:11 am

      HI Sunny,

      Permanent line can't be repaired and you need to replace the lcd panel.

      Jestine

      Likes(1)Dislikes(0)
  21. Sunny

    November 3, 2012 at 4:09 am

    THANX Sir

    Likes(0)Dislikes(0)
  22. SHEZI

    November 13, 2012 at 2:43 pm

    HI SIR, I HAVE TWO QUESTION WITH YOU. I HAVE IBM LCD BUT ITS BRIGHTNESS IS NOT SO HIGH, CAN WE  INCREASE ITS BRIGHTNESS REPAIR BY REPAIR. 
    AND 2ND IS THAT,
    MY DELL MOTHERBOARD'S CELL SYSTEM IS NOT WORKING I HAVE CHANGE ITS COMS BATTRY MANY TIMES BUT IT STILL WANT TO RESET TIME AND I WAS ALSO UPDATE ITS BIOS BUT IT IS HAS PROBLEM.

    Likes(0)Dislikes(0)
    • Jestine Yong

      November 14, 2012 at 11:06 pm

      Hi SHEZI,

      Usually it can't be done. Try to enter the service mode and see if there is any setting that can increase the brightness. You may need to find the service manual in order to log into the service mode. As for the motherboard, it could be the clock generator ic problem. make sure the crystal frequency is correct.

      Jestine

      Likes(1)Dislikes(0)
  23. altaf

    October 29, 2014 at 6:08 pm

    sir i have hp system its vrm circuit mosfet got shorted, then i have replaced foulted mosfet then system got ready but after 4 hours same mosfets again shorted why? can you help me
    Altaf

    Likes(0)Dislikes(0)
    • Jestine Yong

      October 30, 2014 at 8:43 pm

      HI Altaf,

      It can due to the part that you use :

      1) not original
      2) different part number used
      3) improper gate signal
      4) bad corresponding component

      Jestine

      Likes(0)Dislikes(0)
      • altaf

        November 1, 2014 at 11:55 am

        Sir parts are original having same part number. but i don't know that how can i check improper gate signal of mosfet. if you can tell me about then i will be thankful of you.

        Likes(1)Dislikes(0)
        • Jestine Yong

          November 1, 2014 at 3:07 pm

          You need to use oscilloscope and see the waveform and compare with a good mosfet gate signal.

          Jestine

          Likes(1)Dislikes(0)
      • Musicrobert

        November 8, 2014 at 3:05 am

        If you are replacing with an exact replacement part.
        The failure of the subsequent replacement parts is probably due t the reason why the original part failed.
        EXCESSIVE current or voltage through the device.
        These devices have a specified amount of current they can handle.
        Something in the circuit is pulling more current to flow through the device causing it to fail.
        HINT: a shorted/leaky E-cap, bad HV transformer, or other leaky components will cause enough extra current to flow through it to exceed it's engineered current handling capability....causing it to burn up.

        Likes(1)Dislikes(0)
  24. balaji

    November 17, 2014 at 11:06 am

    I want to your updates regularly via email about. Computer chiplevel repairing..

    Likes(0)Dislikes(0)
  25. syed

    November 25, 2014 at 11:41 pm

    How can I check driver ic and power ic

    Likes(0)Dislikes(0)
    • admin

      November 26, 2014 at 12:54 pm

      Hi Syed,
      By using dc volt meter to check on the dc supply voltage and an oscilloscope to check on theoutput waveform.

      Jestine

      Likes(0)Dislikes(0)
  26. syed

    November 25, 2014 at 11:48 pm

    Northbridge chip heating problem.why its happen

    Likes(0)Dislikes(0)
    • admin

      November 26, 2014 at 1:04 pm

      Few factors that can cause the chip to overheat like the quality of the ic used (certain ICs have life span), improper dc supply voltage, ventilation design problem, dried heat compound and bad solder joints of the small solder ball.

      Jestine

      Likes(0)Dislikes(0)
  27. Raju Chaudhary

    April 9, 2016 at 7:20 pm

    my motherboad ecs h61 m2 sudenly dead at working period how can solve this problem plz help me

    Likes(0)Dislikes(0)
    • Jestine Yong

      April 11, 2016 at 10:57 am

      Hi Raju,

      It is difficult to trace a motherboard when it can't start because it can be due to many causes such as bad Bios, Bad VRM section, bad Ram, shorted capacitors and etc. I suggest that you get the right PC Post card for your type of motherboard first as this can eliminate the guessing game. Before that make sure all the VRM circuit is producing all the right output voltages.

      Jestine

      Likes(0)Dislikes(0)
  28. pradhum som

    November 6, 2016 at 11:44 am

    Hi sir I have replaced my smps and bought new one but my PC isn't starting .......plz help.......

    Likes(0)Dislikes(0)
    • Jestine Yong

      November 7, 2016 at 9:02 pm

      Hi Pradhum,

      If you have replaced with a new ATX power supply and the PC still isn't working then it is the motherboard fault. It can be due to many reasons from bad Ram, Rom, shorted components up till bad ICs.

      Jestine

      Likes(0)Dislikes(0)

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