Sabertooth X79 turning on and off

brcafi

Commendable
Jun 26, 2016
1
0
1,510
Hi guys! Here's my question:

My workplace was recently throwing out a bunch of their old PCs that didn't work, and they were up for grabs. I grabbed two. One of them is a pretty clear case: the water cooler burst and leaked onto the CPU and (I'm assuming) pretty much fried everything.

The second one, though, I can't diagnose. It powers on for about one second, then shuts off. This repeats over and over again as long as its plugged in.

The board is a Sabertooth X79 with an Intel i7-3930k.
6x4GB DDR3 Adata RAM.
GS800 800w PSU
No video card or HDD (the company removed those before putting them up for grabs, obviously).

I've tried removing every single thing from the board and powering it up, but the problem persists (one stick of RAM, no stick of RAM, etc). I've done the "paper clip test" to the PSU to determine if that was faulty, and the PSU works fine. I even swapped out both the PSU and CPU from the other computer to test them out, but there is no difference in its behavior. I don't see any visibly damaged capacitors or parts on the mobo, either.

Does anyone have any idea what I should try next?? I'm hesitant to throw out the board completely because I feel that there's a possibility that its fixable (and I'd rather fix it than spend $500+ on a new one when that might not even be the main problem D:).
 
Solution
The X79 platform doesn't have an onboard GPU so you're going to need a dedicated GPU to see if display is output from your system i.e you can get to BIOS. The problem with your paperlcip test is that it shows your PSU is working but it doesn't give you any indication as to how much load it can handle before it becomes a fire hazard or an "electrically-unstable-device-that-takes-out-your-system" kind of device. So that is a moot effort for the PSU. You should however see if you can borrow a PSU of at least 650W from a reliable brand and try it out with your dedicated GPU. You may require a spare HDD to see if you can boot up into your BIOS.

Are both system's identical? It might be that they knew what they were doing thus you...

Lutfij

Titan
Moderator
The X79 platform doesn't have an onboard GPU so you're going to need a dedicated GPU to see if display is output from your system i.e you can get to BIOS. The problem with your paperlcip test is that it shows your PSU is working but it doesn't give you any indication as to how much load it can handle before it becomes a fire hazard or an "electrically-unstable-device-that-takes-out-your-system" kind of device. So that is a moot effort for the PSU. You should however see if you can borrow a PSU of at least 650W from a reliable brand and try it out with your dedicated GPU. You may require a spare HDD to see if you can boot up into your BIOS.

Are both system's identical? It might be that they knew what they were doing thus you actually have parts that aren't worth salvaging. That may very well be the reason why they were chucked out.

You should also inspect the CPU sockets for any bent pins. I've included this guide for any No POST situations.
 
Solution