[SOLVED] PC won't boot, PSU still works after breaker flipped. Is my motherboard toast?

[EvanSlowski]

Last week the breaker to the plug that my PC is connected to flipped and my PC shut off, it is connected to a surge protected power bar. After that happened it wouldn't turn back on so I left it overnight and the next morning, my PC booted back up normally. I left it running for 6 days as I was too scared to shut it off. Before bed one night I decided to shut it off as it seemed to be working normally again but it now won't turn on (this has been 48+ hours now). There are no obvious signs that anything on my motherboard have been fried and there was no smell indicating that.

I've tried:

• Paper clip tested the PSU and confirmed that it still works
• Removing/resetting CMOS
• Reseating the CPU
• Made sure all connectors on PSU are fully plugged in
• Removed all RAM slots and tried booting with a single stick
  

When I try to turn on my PC, I get a click from the PSU and all the EZ Debug lights flash on for a second then it doesn't boot up. If my motherboard was dead I'm not sure why it would come back on and work for those 6 days then stop working after shutting down my PC completely. Kind of lost on what to try next.

 

[DSzymborski]

The paper clip test can't confirm that your PSU still works properly. All it can do is confirm a PSU that is totally dead is actually totally dead. Depending on the specs -- which you didn't provide -- I'd be more inclined to swap out the PSU first. Only if this was a known working PSU, as in operating normally with a PC, not simply showing signs of life when powered, would I then move on to worrying about components.