I have an X9-SRL-f that was working fine under server 2012 R2 until it suddenly wasn't. Now the board will turn on, I'll see the bios start to load and then suddenly power off. At first I thought it was a bad psu although changing that had no effect. Swapping out the cpu and memory also didn't help things any neither did clearing the cmos. I'm at a bit of a loss what to even consider next, is the board just shot?