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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 and LEDs on the front of the server.
CD-eject button: Press this button to release a CD from the CD-ROM drive.
CD-ROM drive activity LED: When this LED is lit, it indicates that the CD-ROM
drive is in use.
Diskette drive activity LED: When this LED is lit, it indicates that the diskette drive
is in use.
Diskette-eject button: Press this button to release a diskette from the diskette
drive.
System-error LED: When this LED is lit, it indicates that a system error has
occurred.
System-locator LED: Use this blue LED to visually locate the server if it is in a
location with numerous other servers. If your server supports IBM Director, you can
use IBM Director to light this LED remotely.
Hard disk drive activity LED: When this LED is flashing, it indicates that a 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.
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 cord from the electrical outlet.
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.
Rear view
The following illustration shows the LEDs on the rear of the server.
CD-eject
CD-ROM drive
button
activity LED
Diskette drive
Diskette-eject
activity LED
button
Chapter 1. Introducing the xSeries 306 Type 8836 server
System-error LED
System-locator LED
Hard disk drive
activity LED
Power-on LED
Power-control button
Reset button
7
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