[Solved; dead]Dead Power Supply?

So, the other day I was moving some wires in the case to clean up clutter and do some measuring. Accidentally, a metal contact touched the motherboard. Usually no big deal, but I had it running. The computer shut off, as I believe it caused a short. When I turned it back on, the motherboard POST'ed, listed drives and devices, then before booting asked me to "Run F1 for setup" basically because it entered a safety mode to prevent from electrical damage. I'd have to go in to the BIOS and manually boot from my device, then everything would run fine. The message kept re-appearing on future boots though. So, I tried clearing the CMOS memory. After doing so, the computer would turn on and things would spin up, but shut off completely in less than two seconds. I tried disconnecting all the connections, then reconnecting them. Still does the same thing. I'm assuming it's not the motherboard, as all of it's lights come on. And I'm thinking it has to be the power supply, as I was also running it fairly close to it's limits. Here's so info on what I have.

Motherboard is an ASUS Maximus IV, LGA 1155, P67 "Revised".
i5 2500k stock-clock.
Corsair H100
Five 120mm fans.
Corsair Force GT SSD.
Seagate Barracuda.
DVD/CD R/W drive
Two, crossfired, XFX Radeon 6950's.
And powering it all was a Corsair 750 TXV2.

I've had the PSU for about a year and a half. And it's suffered through a power surge or two. It also was in a previous custom build that was in a house fire. And "refurbished" and cleaned. So, I'm guessing it's just the power supply. I hope so, I'd rather not have to install and reconfigure everything, if it were the motherboard.

By calculations, At tops my computer used around 670 watts. I was considering getting a Corsair AX 750, as it's fully modular and very attractive. Maybe spend a bit more for an 850.

Thoughts/input will be much appreciated.


*I do not have any other power supply I can try, nor another computer to try my current one in.
Edited by Sazexa - 7/22/12 at 10:23pm

Yes, it was on surge protectors both times.

Once was some time during a lightning storm. The one time I didn't disconnect it during an electrical storm.
The second time was from a quick power failure during a hurricane.

The power supply itself was not IN the fire, but had a (for lack of better words) ****-ton of smoke poured into it (and the previous case.) It was cleaned out by a company specializing in doing so, but that was a pretty significant fire. The computer it was in was one of the only electronics spared.

I was pushing it's limits, but not by too much I'm fairly sure. According to those power-supply calculators, I only used around 650ish watts of it's "750" potential. But then again, due to it's age, usage, and wear on it, it probably was running short on it's life.

Also may be worth mentioning:
The official product does not say it supports CrossFireX or SLI, but it had four total PCIe (6 to 8 pin) cables, and had it running in Crossfire on two 6950's since January.

My next one, in plan, was a AX series. Maybe 750, but I'll probably go up to 850, to give me a lot more headroom for power.

So, I just opened up an old computer. Hooked up the Corsair one to the computer and tried to turn it on. Did the same thing as before with my desktop except:

No motherboard LED lights.
No optical/hard disk/fan spin up.
No power LED.
PSU fan will stay on with a very, subtle, gentle, quiet "ticking" as long as I hold the power button.

Guess is safe to say my power supply has malfunctioned.

Well, sadly it was the opposite of what I thought.
I got my new power supply, hooked everything up, and same issue as before. So I'm assuming that once my new board is in, everything will work fine. Hopefully I won't have to re-install windows since it will be that same exact board. But we'll see.