A power supply unit is a a box that powers your Desktop PC and runs all the components you have hooked up on the motherboard... But lets just say your computer stops working and you want to know if the power supply is bad or the motherboard is bad??? or maybe you want to test out a component you bought off ebay or something... So in this tutorial I will show you how to start a PSU with a paper clip!!!
PSU (Power Supply Unit)
Something to test the PSU