Power Down the Server for Immediate Shutdown Using the On/Standby Button
 | Caution - An immediate power-off might corrupt system data, therefore, use this procedure to power down the server only after attempting the graceful power down procedure. |
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Press and hold the On/Standby button for four seconds to force the
Main power off and to enter Standby power mode.
When Main power is off, the System OK LED on the front panel begins blinking, indicating that the server is in Standby power mode. See Server System-Level Status Indicators.
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Disconnect the power and data cables from the server.
See Disconnect Cables From the Server.
Caution - When you press the On/Standby button to enter Standby power mode, power is still directed to the service processor and power supply fans. To completely power off the server, you must disconnect the power cords from the power supplies.