| 摘要 |
A power-on self test ("POST") apparatus and method for the power supply of PC, work station and server systems. A POST switch is installed in the power supply portion of the PC to allow the user to conduct self-testing of the power supply during troubleshooting. When the PC system becomes inoperative, activating the POST switch on the power supply will quickly determine whether the problem lies in the power supply or in the computer main board. The POST switch, when activated by the user, creates a power loop within the power supply by bringing a predetermined input terminal in the power supply to ground. If the power supply is operational, the cooling fan, and/or an LED indicator, will turn on, indicating its status. If the power supply is malfunctioning, the fan or the LED will not turn on, alerting the user that the power supply is where the failure lies. The input terminal in the power supply is a pin typically connected to receive a "POWER GOOD" signal from the PC, when the PC is turned on, so that the power supply can commence its operation. By switching that pin to its activated state using the POST switch, the power supply can be turned on, despite possible malfunctioning of the computer main board.
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