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## How to Power On the Server

1. Verify that the server’s power supplies are connected to an AC power source and that the server is in standby power mode.

   In standby power mode, the Power/OK LED on the front panel blinks, indicating that the service processor is working and the system is ready to be fully powered on to full-power mode.

2. Use a stylus or other nonconducting pointed object to press and release the recessed power button on the server front panel.

   The server performs power-on system tests (POST) and boots to the OS.

See Also

- About Power Modes

- Sun Fire X4640 Server External LED Locations and Meanings

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