Hello, I am wondering what are some potential reasons that my newly built PC turns on and then turns off a second later when I try to turn it on. Also It will not do the same thing again unless I switch off the mains and turn them back on again - any ideas.
I have tried it with 2 PSU's but the same thing happens.
also the fan of the CPU and PSU etc start spinning
I had the same problem and i was trying to shove a corsair 800watt gs in my 14x5x12 case and the same thing happened so i went it, wiggled some wires and i found out it was the sata cord running from my hdd to the motherboard andif it wasnt that i unpluged all the usb devices and it still starts fine
Power on the computer the fans spin up, cd rom starts to spin up and then it shuts off and will not restart untill the power supply has been cycled off then on again.
Doctor debug shows post codes up to 0x4f which is - DXE UPL is started.
Im currently swapping the psu with another to check for a power supply issue.