To clarify, when going to start work today, I pressed the power button and it started up for a half a second, then nothing. I’ve since cleaned out the fans and checked the back PSU BIST, which is green for that half second when the power button is pressed. I held down the PSU BIST button and was able to start the computer no problem, but I need to hold the button down to keep it from dying immediately. Any ideas as to what’s going on here?