Did i fry my Mobo?  

  1. Posts : 135
    W10 Pro 1909 18363.476

    Did i fry my Mobo?

    a75 pro 4m, asrock

    older pc that some intermittent reboot problems. Have it on my desk to take it apart and put it back hoping it would repair itself. Figured out that the 20pin (24?) power supply would cause it to reboot. Basically, although jammed in to the board, it had enough room to move and reset.
    SO...jammed it in and installed 10, multiple reboots. Came home to reboot for more updates and it stuck on the bios. I wiggled the 20/24 cable ( ) and off it went.
    Power is getting to the board. USB thumb lights up, vid card inserted lights up but I can't get it to reboot.

      My Computer

  2. Posts : 4,453
    Win 11 Pro 22000.708


    The ATX power cables I've seen each have a clip that locks the connector to the motherboard. If that's engaged, there shouldn't be much play in the connector.

    I don't know if you can damage the motherboard if power is supplied and the ATX connector isn't seated properly.

    The MB has a 24 pin connector, but it is also supposed to be compatible with a 20 pin, should your PSU be that old.
      My Computers

  3. Posts : 3,324
    Windows 10 Pro x64

    If the plug is seated properly, the first thing I would do is disconnect it and check to make sure plug and socket connectors look OK.
      My Computer

  4. Posts : 14,749
    Windows 10 IoT

    If you've tripped the short circuit protection you'll have to completely remove power to reset it. Unplug the power supplies AC cord from the wall outlet. Then press and hold down your case power button for 5 seconds or more. The power LED will likely very briefly lite up. Now plug the ac plug back in and have another try powering it up.
      My Computer

  5. Posts : 4,185
    Windows 11 Pro 64 Bit 22H2

    power supply would cause it to reboot..... I wiggled the 20/24 cable ( ) and off it went.
    Sounds like a Bad PSU, try replacing with a known good one and see how you get on.
      My Computer

  6. Posts : 3,334
    Windows 10 Pro 64-bit 21H1 (May 2021 build 19043.1083)

    If the motherboard capacitors have developed some load, it could not switch on properly. Remove the power cord, press the power on button several times to discharge and then put the power and try again. Also check your PSU, it may be faulty.
      My Computer


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