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Precision 3630 Tower Service Manual

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Power supply unit Built-in Self Test

Precision 3630 supports a new power supply unit Built-in Self Test (BIST). You can test the health of the power system by pressing the test button or by connecting the power cord. When the power cord is connected, the self-test LED is lit for 3-5 seconds indicating PSU functionality. To test the health with PSU BIST button follow the below steps:

  1. Turn off your computer.
  2. Disconnect the power cord from the power supply unit, and wait for 15 seconds.
  3. Press the PSU BIST button.
    • If the LED turns on and remains on while the BIST button is pressed, it indicates that the power supply unit is functional. Continue with troubleshooting steps for other devices.
    • If the LED does not turn on, it indicates PSU failure.
    Image: Power-supply unit

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