Computer power test method

time：2025-07-11 08:01:14 Gadget Insights

Reference content 1:

1. Press the power button to see if the power fan is rotating. If it can't be rotated, then it can be removed for troubleshooting.

2. In order to accurately judge whether it is a power failure, after removing the power supply, you can use any conductor to connect the green wire with the black wire, and see if it rotates after connection. Or use a multimeter to test the voltage between the green and black wires (the voltage should be about 5V at this point). If the voltage value is too low or none, then the power failure problem can be directly determined.

3. If the above method is tried (the power supply fan can rotate, and the voltage value is also about 5V), then or the power supply is normal, but in order to accurately judge whether it is really bad, first learn to look at the nameplate on the power supply, we don't need to understand all the content on the nameplate, just understand what the voltage of the various colors of the line is. We can make simple measurements by following the identification on the nameplate: Red +5V, Yellow +12V, Orange+3.3V, White -5V, Blue -12V, Purple +5V. See if you can see if you can see if you have the correct values for the above labels.

Reference content 2:

1. Prepare a wire that can conduct electricity and remove the insulation skin at both ends.

2. Plug the power supply of the computer to be tested into the power cord and make it powered.

3. Hold the 24P connector on the computer power supply and connect one end of the prepared wire to the corresponding hole of the green wire. The voltage of the computer power supply is only 5 volts, please be bold and feel free to operate it.

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