How To Check The Power Supply Of My Pc May 2026

“But what if the fan spins but voltages are wrong?” Leo asked.

“Still dead,” Leo muttered. “So the PSU might be fried?” how to check the power supply of my pc

Maya smiled and handed him a multimeter. “Then you become a detective. Set it to DC voltage, 20V range. Touch the black probe to a black ground pin, red probe to a yellow wire—that’s +12V. Orange is +3.3V, red is +5V. If they’re off by more than 5%, the PSU is dying.” “But what if the fan spins but voltages are wrong

She pulled up a chair. “First, the easy stuff. Don’t get technical until you’ve checked the dumb things.” “Then you become a detective

“Insert one end of the paperclip into the pin slot with the green wire, and the other into a black ground pin. Be careful not to touch anything metal.”