How To Check Computer Power Supply With Multimeter?
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1. Disconnect the power supply from the wall outlet.
2. Set the multimeter to the DC voltage setting.
3. Connect the black probe of the multimeter to any of the black wires of the power supply.
4. Connect the red probe to any of the red wires of the power supply.
5. Check the voltage displayed on the multimeter. The voltage should match the voltage rating of the power supply.
6. If the voltage displayed is low, then the power supply is faulty and needs to be replaced.