Let me first say that I'm not a computer n00b. I have built several with no real problems until now.
I went home from school this past weekend with my computer to have a LAN party with some friends. One friend brought a power strip that's estimated to be ~25 years old. I plugged my computer and monitor into it, as did he. His started up fine, but mine didn't.
HISTORY: Once my psu is unplugged, the capacitors need to be recharged. normally I after it had been unplugged I would press the power button and it would start quickly, then shut off for 2 seconds then automatically startup again.
So I press the power and it starts and stops (as expected), but it doesn't start again. I tried again and it didn't respond at all. I moved plugs and it started up finally, but there was no display. (I have an nvidia 7950GT requiring power from the psu.) This made me nervous, so I unplugged it and plugged it into the wall., I tested the monitor on another computer and it worked. I tried other things like removing the card from the pcie slot and plowing it out, but nothing worked. The more times I started and stopped the pus, the more unstable it became until finally it wouldn't start at all. I was just about to try a different video card when this happened.
My question (and I'm pretty sure I know the answer) is do you think this is the power supply or sopmething else? I entertained the Idea of a bad motherboard for a while (ga965p-ds3 rev.1), and I don't think it's my video card (unless there is a problem with it unrelated to the other issues).
So with all that said, I think it's the psu (RP550-2). I just wanted the opinions from those more savvy than I.