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Server controls, LEDs, and power
This section describes the controls and light-emitting diodes (LEDs) and how to turn
the server on and off.
Front view
The following illustration shows the controls, LEDs, and connectors on the front of
the server.
1 Power-on LED 6 CD-eject or DVD-eject button
2 Power-control button 7 CD or DVD drive activity LED
3 Hard disk drive activity LED 8 Optional diskette-eject button
4 System-error LED 9 Optional diskette drive activity LED
5 USB connectors
Power-on LED
When this LED is lit and not flashing, it indicates that the server is turned
on. When this LED is flashing, it indicates that the server is turned off and
still connected to an ac power source. When this LED is off, it indicates that
ac power is not present, or the power supply or the LED itself has failed. A
power LED is also on the rear of the server.
Note: If this LED is off, it does not mean that there is no electrical power in
the server. The LED might be burned out. To remove all electrical power
from the server, you must disconnect the power cords from the electrical
outlets.
Power-control button
Press this button to turn the server on and off manually.
Hard disk drive activity LED
When this LED is flashing, it indicates that the associated hard disk drive is
in use.
Chapter 1. Introduction 5