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Chapter 3. Server controls, 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, LEDs, and connectors on the front of
the server.
CD-eject or
DVD-eject button
CD or DVD drive
activity LED
Hard disk drive
activity LED
Power-on
LED
Power-control
button
System-error
LED
USB connectors
(Optional) Diskette-eject
button
(Optional) Diskette drive
activity LED
Power-on LED
When this LED is lit, it indicates that the server is turned on. When this LED
is off, it indicates that ac power is not present, or the power supply or the
LED itself has failed.
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 a hard disk drive is in use.
System-error LED
When this amber LED is lit, it indicates that a system error has occurred.
An LED on the system board might also be lit to help isolate the error. See
Chapter 5, “Solving problems,” on page 49 for additional information.
Detailed troubleshooting information is in the Problem Determination and
Service Guide on the IBM xSeries Documentation CD.
© Copyright IBM Corp. 2006 33