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#1
Gene R

Gene R

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HP Pavilion a535W desktop w/XP
After storm and a big boom outside, PC will not power up.

Used a PS Tester and the 20 pin MD power connector,all lights lite except the -5v whick doesn't apply, PS fan was running. Hooked up the 4 pin MB power connector and the +12 light lite and the PS fan ran during the whole test procedure. Reconnected them to the MB and plugged it in and nothing, no PS fan, no lights anywhere..

Took front cover off and checked the pwr switch, it appears to be functioning satisfactor. Can't see a fuse on the MB.

Any thoughts/suggestions???
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#2
rshaffer61

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Doesn't sound good. It sounds like the mobo took the hit and not the PSU.
Any warranty on the system? You might try a bench test on the mobo to see if it is the issue.

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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#3
Gene R

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Thanks for the reply. I'm @ work so it may not get done today or even this weekend so I'll post after I try everything you suggested. So, don't give up on me, I'll be back on it next week.

Thanks again...
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#4
rshaffer61

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No problem, I'll get a email notification of your reply. :)
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#5
rshaffer61

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Are you still having problems with your issue?
It has been 19 days since your last response and I was wondering if the issue has been resolved?
If so can you explain how it was resolved so others may be able to fix it if they have the same issue.
If not please let us know and we can continue with helping you to resolve the issue.
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