Computer-Power-Supply

Computer Power Supply /ac power supply failure/SMPS power supply failureFailures causes by various factors

Fluctuation in ac power supplies

improper supply of power due to poor electrical wiring

missing of earth from the main ac power supply

As you see a standard electrical plug with three pins where each and every pin has specific job to do

Top Pin ( EARTH)

like big fat pin supply earth to the system body or neutralize the electrical ac power supply if passes through the system body

Right Pin ( PHASE)

Supplies positive charge ac power supply to the system

Left pin ( NEUTRAL)

Supplies Negative ac power supplies to the system

Those three pins are very much required for any computer system, as you see in the second socket there is top pin is missing in the second one which may cause your system in trouble and also cause shock when you touch your computer cabinet.