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Chapter 3. Server controls, LEDs, and power
This section describes the controls, light-emitting diodes (LEDs), and connectors. It
also explains 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.
CD-ROM drive activity LED: When this LED is lit, it indicates that the CD-ROM
drive is in use.
CD-eject button: Press this button to release a CD from the CD-ROM drive.
Hard disk drive activity LEDs: When one of these LEDs is flashing, it indicates
that the associated SCSI hard disk drive is in use.
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-on
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
Power-control button: Press this button to turn the server on and off manually.
Reset button: Press this button to reset the server and run the power-on self-test
(POST). You might have to use a pen or the end of a straightened paper clip to
press the button.
© Copyright IBM Corp. 2004
CD-eject button
CD-ROM drive
activity LED
Hard disk drive
status LEDs
USB connectors
server. The LED might be burned out. To remove all electrical power from
the server, you must disconnect the power cord from the electrical outlet.
Hard disk drive
activity LEDs
Power-on LED
Power-control
button
Reset button
Operator
information
panel
27
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