A rapid self-error-check circuit of a computer power supply is disclosed, wherein a computer power supply is installed with a self-detecting device; an LED displaying light and detecting button are exposed on the casing of the power supply; thereby, the normality of the power supply can be detected by pressing a detecting button and then the result is displayed through the colors of the LED displaying light.
A power supply unit according to a preferred embodiment of the invention is self testing. The power supply unit is enabled to function with no external loads applied, and includes a visual indicator of whether or not one or more voltage outputs of the power supply unit is within tolerance. To benefit from the self-test feature, a user in the field may simply unplug the power supply unit from all loads, plug the unit into an A/C source, and observe the visual indicator. If the visual indicator is lit, then the user may reasonably assume that the power supply unit is functioning correctly. But if the visual indicator is not lit, then the user may reasonably assume that the power supply unit is faulty.
