When AC power is applied to the server power inlets, the System A or System B server boots into Standby power mode. For information, see Server Boot Process and Normal Operating State Indicators.
Use the following procedure to reapply Main power for System A or System B server components.
When the server is powered on and the power-on self-test (POST) code checkpoint tests have completed, the System B green System OK LED status indicator on the front panel of the server lights and remains lit.
Verify that the two power supply AC OK LEDs are lit.