Chapter 3. Server controls, connectors, LEDs, and power
This chapter 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 and LEDs on the front of the server.
Note: The front bezel door is not shown so that the drive bays are visible.
USB 2
USB 1
Power-control button
DVD-eject button
DVD drive
activity LED
(green)
System power LED
Hard disk drive activity LED
System locator LED
System-information LED
System-error LED
Hard disk
drive activity
LED (green)
Hard disk
drive status
LED (amber)
System power 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 is 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.
Power-control button: Press this button to turn the server on and off manually. A
power-control-button shield comes with the server. You can install this disk-shaped
shield to prevent the server from being turned off accidentally.
Hard disk drive activity LED: When this LED is flashing, it indicates that a hard
disk drive is in use.
System locator LED: Use this LED to visually locate the server among other
servers. You can use IBM Director to light this LED remotely.
© Copyright IBM Corp. 2008 35
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