Test the outlet and surge protector into which the power supply has been plugged. Power off the computer, unplug it from the surge protector, and then unplug the surge protector from the wall outlet.

If you want to test the Power Supply Unit (PSU) of your Windows computer, use one of the methods mentioned in this post.

Attach the processor and heatsink to the second test computer, which uses the same type of processor. Reconnect the power cord. Power on the computer.