This test bypasses the need for a case switch, allowing you to verify the unit is active. Follow these steps carefully: Unplug the PSU from the computer and locate the 24-pin main connector.
Easy Power Supply Unit Diagnostic Steps
If the fan does not spin or makes grinding noises, the PSU is faulty. If the fan does not spin or makes grinding noises, the PSU is faulty.
3V 4 Yellow 12V 5 Yellow 12V 6 Red 5V 7 White -12V 8 Gray P. Visual and Physical Inspection A thorough visual inspection can often reveal obvious issues without the need for tools.
Easy Power Supply Unit Diagnostic Steps
Smell the air around the PSU; a distinct burnt odor is a definitive sign of electrical failure and requires immediate replacement. If the PSU fan spins continuously, the unit is receiving power and is likely functional.
More About How to test power supply of computer
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