OK now I'm stumped...

[Atheus]

The other day I turned my computer off for a while (always a bad idea) and then it did no longer work. Nothing. No POST. Just fans for about 5 seconds and then auto restart.

Naturally I assumed my motherboard, a Gigabyte 965P-DS3P, had taken all the abuse it could handle and had finally given up the ghost. I ordered a P35-DS3P to replace it and also took the opportunity to aquire an 8800GT and 22" samsung monitor... couldn't resist...

So I hook up all the replacement parts and fire it up - same thing! Restarts itself immediately!

I already tried running with one memory stick, removing all the drives, running the whole thing with no case, etc, so now I'm thinking I've done something very stupid - is it possible the PSU had gone bad? Could it have killed the board, and then when I installed the new one, killed that too?!? So I take the PSU (Enermax Liberty 500) to bits. Internally it looks fine - nothing blown and no bulging caps - so I green wire test it with a minimal load of one fan. Works fine. Voltages within spec when measured with a digital multimeter. Whats more there were no burn marks on the board power connections which were present last time I killed a board with a PSU.

All the same I tried with a completely different, if underpowered, PSU - same damn thing...

Now I'm stumped.

Anyone got any ideas short of getting *another* board, PSU, memory, and processor?

 

[ch33zw1z]

What you want to do is pull everything from the mobo and fire it up. If you receive NO POST errors, you have a defective board or PSU. try another PSU if you have one laying around, try a spare board with the suspect PSU if you can.

 

[mechBgon]

The problem is obviously the 8800GT. You should send it to me promptly for proper disposal


I would tend to suspect the PSU as well. You didn't overlook the ATX12V receptacle up behind the upper end of the mobo's heatpipe, by any chance? Or the video card's auxiliary power cable? Dumb questions, sorry

 

[Atheus]

Originally posted by: ch33zw1z
What you want to do is pull everything from the mobo and fire it up.

Yea I did that. Same again.

/edit:

unless you mean *everything*, like, including CPU and memory?

try another PSU if you have one laying around, try a spare board with the suspect PSU if you can.

Tried another PSU, got the same thing, so I assumed motherboard. Got a new one, put the original PSU on it, and same result. Did I fry the new board? Its possible but it doesn't look fried, and the PSU appears to provide stable power, at least under minimal load.

I mentioned all this in my post but it was a bit long and rambling...

 

[Atheus]

Originally posted by: mechBgon
The problem is obviously the 8800GT. You should send it to me promptly for proper disposal


I would tend to suspect the PSU as well. You didn't overlook the ATX12V receptacle up behind the upper end of the mobo's heatpipe, by any chance? Or the video card's auxiliary power cable? Dumb questions, sorry

It was all hooked up properly as far as I know, and it should have made a noise if I missed an auxiliary power thing anyway, they usually do.

There isn't a convenient little fuse on a gigabyte board is there? Something I can replace or solder over to try again? Probably to much to hope for.