Alright, so it's doing it AGAIN. It worked fine all day yesterday and all night, I unlocked my Athlon II x3 440 to a quad core, P95 tested and stable for an hour and a half (got too excited to test any longer), OC'd my video card and played games all night. Ran P95 while I slept, stable for 8 hours, temps never hit above 35-40 celsius. Played some more games, went to reboot, and it wouldn't start back up. This is how it's been since I got it, it starts and runs fine until I turn it off, then it doesn't want to boot again.
I've taken the mobo out of the case to check for shorts and tried it, nothing. Taken the CPU out of the mobo, no beeps (it's supposed to beep if there's no CPU, right?). Either I'm not resetting the CMOS correctly or it's not working. Right now it's just the mobo connected to the PSU and speaker... No RAM, video card or CPU. With or without the CPU in, it does the same thing (which is nothing).
Is the mobo dead? Is there any way to check without having another mobo? What else could it be?