If you are using a surge protector or power strip, ensure its switch is turned on and that it is not damaged. A simple way to test a standard ATX power supply is the "paperclip test," where you bypass the motherboard connector to see if the fan spins.
Step-by-Step Troubleshooting for a PC That Won't Switch On
Disconnect all non-essential peripherals—removing USB drives, external monitors, printers, and secondary drives—and attempt to start the machine again. Start by ensuring the wall outlet is functional—plug in a lamp or another device to confirm it has power.
Next, inspect the power cable connecting the outlet to the back of the PC; a damaged cord is a frequent culprit. Once inside, visually inspect the RAM modules; loose or corrupted memory can prevent the machine from posting.
Step-by-Step Troubleshooting for a PC That Won't Switch On
This "minimal boot" approach helps isolate the problem. Inspecting The Power Supply Unit (PSU) If the cable and outlet are confirmed working, the power supply unit (PSU) becomes the primary suspect when a desktop pc wont switch on.
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