How To Check Psu Power File

The Power Supply Unit (PSU) is the heart of your computer. When it starts to fail, it doesn't just shut down; it can cause random reboots, blue screens, and even damage other components.

This test only confirms if the PSU powers on — if voltages are correct. Use it when your PC is completely dead. how to check psu power

Idle voltages can look fine, but a PSU may drop rails or shut down under real power draw. To check : The Power Supply Unit (PSU) is the heart of your computer

This tells you if the PSU is outputting correct voltages . You'll need a digital multimeter (under $20). Use it when your PC is completely dead

Checking voltage stability and efficiency while the PC is running.

| Symptom | Likely Issue | Check | |---------|--------------|-------| | PC dead, no lights, no fans | No power input or dead PSU | Paperclip test | | PC powers on briefly, then off | Short circuit or PSU overload | Disconnect all components, retest with paperclip | | Random reboots under gaming | +12V drooping under load | Software load test or swap test | | USB devices act strangely | +5V out of spec | Multimeter (idle) | | PC won't wake from sleep | +5VSB failing | Multimeter (standby) |