Gather your tools before starting. This guide provides a detailed, safe methodology for how to test a desktop power supply without relying solely on expensive diagnostic tools.
Understanding Power Supply Voltages with a Multimeter
Start by reconnecting the paperclip to the green PS_ON pin and a black ground pin. This test bypasses the need to open the case and plug in the motherboard, allowing you to check the PSU in isolation.
Before beginning any test, you must ensure the computer is completely disconnected from the power source. Turn the PSU on and use your multimeter probes to touch the corresponding pins of the 24-pin connector.
How to Read and Verify Power Supply Voltages with a Multimeter
3V rail should fall between 3. Using a paperclip or a small piece of wire, bridge the connection between the green PS_ON pin and any adjacent black ground pin.
More About How to test a desktop power supply
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More perspective on How to test a desktop power supply can make the topic easier to follow by connecting earlier points with a few simple takeaways.
