a couple of days ago, I had a power outage because of an excessive load.
my pc wasn't connected to a UPS.
when I tried to turn it on, i realized it doesn't boot my os , or any other os for that matter (and i tried many live cd's). it usually hangs in the first second, sends a kernel panic (it's a linux), during acpi loading or something like that, just after cpu profile is loaded.
the thing is, it behaves very strangely.
I had done some memtest86+ test, and they all come out clean, but i've noticed that when I complete the test, the os does boot (usually the boot).
when i turn it off, it doesn't boot again.
also, something strange, when I save changes to bios, sometimes it turns off instead off rebooting, which it usually does.
I've also opened the case, did a little cleaning and moved ram to different slots, and no change.
I'll appreciate if anyone can shed some light on this, because even though my pc is only 4 months old, warranty is not that easy to get when it comes to inconsistencies like this.
You should essentially check everithing - mobo, graphics card, including the PSU, even it seems your systems starts.
Actually you should begin with the PSU - if you have an older one or you can borrow one from somebody for like an hour you may just try it /if you have a weak older one but with compatible with the mobo and videocard wires you may try it with some of your hardware turned off or temporarily removed if it's possible/. If you dont have such option you should carefully check the output characteristics of your PSU - there is an excellent article about all of this on Tom's, but I dont, remember the link, it's cited many times in the forum however...
You never mentioned before you are overclocking, and hardly I suppose.
Sorry, but I can't bring you any good news. I can describe to you what happens when a system, working near the thermal edge gets on top of that a power overload, which your PSU obviously was unable to hold and regulate, causing rising of the voltage inside the system- thus - overcurrents /even if the rised voltage don't cause a direct power surge/ but this will hardly help.