If any reading is "0.00" or significantly outside these ranges, the PSU is faulty and should be replaced immediately. Many testers also have an audible alarm that sounds if a voltage rail fails.
The power supply unit (PSU) is the most critical component for system stability. A failing PSU can cause random shutdowns, boot failures, component damage, or erratic behavior. This report outlines safe, effective procedures to check a PSU’s health—from quick visual inspections to advanced multimeter testing and the “paperclip test.” Working inside a PC carries risk of electric shock and component damage. Disconnect mains power before physical inspection. how to check power supply on pc
Must read close to +3.3V (Safe range: 3.14V to 3.47V). If any reading is "0
