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Troubleshooting the power supply of a computer requires several steps to ensure its functioning properly. First check for any visible damage or unusual smells, which could indicate a problem. It is also important to ensure that all cables and connectors are secure and intact. The use of a multimeter to test the PSU’s voltages against the ATX standard specifications can help determine if the unit is providing the correct power to the computer. For a more hands-on approach, the paper clip test is a simple way to check PSU functionality by shorting the green and black wires of the 24-pin connector, which should power up the PSU fan if it is working properly. Always disconnect the power supply from the computer and any electrical outlet prior to testing. Troubleshooting power supplies can be difficult and can pose numerous risks if not properly implemented. So it is very important to follow the safety guidelines.