Chosen Solution
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?
@Christina Matos What colour is the LED in the Power button when you press it only i.e. without the BIST key as well, to start up the PC? Try disconnecting the power cord from the PSU and then holding the Power button operated for a full 30 seconds and then release it. Reconnect the power cord to the PSU and then try to turn on the PC using the power button only.
