The power supply is still supplying some power to the motherboard, even if the computer is not on. Therefore, something could have been allowed to transition into the computer during the power disruption. In order to test the power supply, they do sell testers for that purpose. However, if that does not appeal to you, just buy a new power supply. They are much less expensive than trying the old power supply on a different computer and ruining the other computer. BTW: I have UPS on all my desktops just for the insurance of any mishaps like you are describing may have happened.
Here's the story:
The power in my apartment has been known to go off and on atleast twice a month. My computer was turned off and plugged into a surge protector when it happened this morning.
I go to turn the computer back on, and nothing happens. I finally swapped the power supply with an old one and nothing happens. Granted, I recently bought a new PSU because this old one was acting funny, so it could have bit the dust as well.
Does the Gigabyte GA-P35-DS3L have an LED light on the board to indicate that it's getting power? If so, then it's not lighting up.
I have cleared the CMOS by removing the battery and leaving the PSU unplugged from the wall for several hours.
I'm thinking either the PSU/and or motherboard are shot. My question is, will it hurt to plug in my PSU to another desktop to see if it works? I don't want it to short out someone else's desktop if it's faulty.
I would hate to buy a new motherboard if this one is fine. Please help!