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| Sun Fire X4470 Server ### Service Manual

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## 6.3 Powering On the Server

If you removed power from the server during maintenance, use the following procedure to reapply main power for all server components.

## Power On the Server

Refer to Power Button, Power/OK LED, and SP Fault/OK LED when completing the following procedure.

1. Verify that the power cord has been connected and that standby power is on.

   Shortly after power is applied to the server, the SP OK/Fault LED blinks as the service processor boots. The SP OK/Fault LED is illuminated solid green when the service processor has successfully booted. After the service processor has booted, the Power OK/LED on the front panel begins flashing slowly, indicating that the host is in standby power mode.

2. Press and release the recessed Power button on the server front panel.

   When main power is applied to the server, the main Power/OK LED begins to blink more quickly while the system boots and lights solidly once the operating system boots.

   Each time the server powers on, the power-on self-test (POST) can take several minutes to complete.

   Figure 6-3 Power Button, Power/OK LED, and SP Fault/OK LED

   Figure Legend

   1 Power/OK LED

   2 Power Button

   3 SP OK/Fault LED

   | Caution - Do not operate the server without all fans, component heatsinks, air baffles, and the cover installed. Severe damage to server components can occur if the server is operated without adequate cooling mechanisms.

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