I put in the memory, cpu and graphics card and hooked it to the monitor. The power supply plug is plugged in, the switch is on O and both the ATX cables are plugged in. Graphics card is plugged in. But nothing will turn on when I try, not even the PSU. I tried the screwdriver trick, I tried putting in the power to the case button and still nothing. Shouldn't the PSU atleast turn on even if something is wrong elsewhere?