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Wont' boot...MOBO?

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I have a self built desktop that will suddenly quit booting. The case fan spins up, the hard drive spins up but it does not post and the cpu fan does not spin up. My best guess is that the mobo has failed. It is an old MSI K9NBPM2-FID business class mobo that was purchased new. There are still a few out there used of about $50. Anyone have a different idea on most likely problem or cheaper shot in the dark soluiton?
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You could try a bench test outside of the case but I am guessing from your description you are probably right.

Disconnect everything from the Motherboard except
  • keyboard
  • mouse
  • video output
  • 20+4 powercable
  • 4/8 pin 12v wire both coming from the powersupply,
  • Cpu fan wire
  • power and reset button to the case
  • case speaker
Now you should have NOTHING connected to the motherboard except what was listed above.

The goal here is just to test the mobo:

If the computer still will not boot up the please remove the motherboard from the computer along with the power supply

place the motherboard on a piece of card board larger than the motherboard,

this will eliminate a short from the mobo to the case which could be a possibility

Install the cpu with, 1 stick ram in dimm 1, power supply, case switch and case speaker
Connect ps2 mouse and keyboard along with the monitor
Repeat the above and power on
If the computer now boots into bios you most likely had a case short so make sure when installing the motherboard in the case that you use standoffs,
and they line up with the mounting holes in the motherboard and none of the standoffs touch anything else on the underside of the board.

Thanks to Cbarnard for these instructions
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