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Dell PowerEdge T20 Owner's Manual

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Power indicator codes for power supply unit

To perform a quick health check on the non-redundant power supply unit (PSU) of the system, press the self-diagnostic button.
Diagnostic Indicator Pattern
Condition
Not lit
Power is not connected or power supply is faulty.
Green
A valid power source is connected to the power supply and the power supply is operational.
Figure 1. Power supply unit indicator codes The figure shows the AC power supply status indicator and self-diagnostic button.
  1. AC power supply status indicator
  2. self-diagnostic button

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