Sony VAIO Digital Studio PCV-RX660 PC Desktop "three wire central heating" Questions

three main voltages:1) Computer plugged into power, computer case open, turn the computer on.TOUCH an unpainted surface of the metal frame, of the open computer case.This action will relieve your body

three different methods to test if the power supply has a weak voltage power rail. 1st method is to simply use a known to be good, compatible power supply, replace the one in the computer with it, and