IBM 8676 - Eserver xSeries 335, Hardware Maintenance Manual And Troubleshooting Manual, Page: 14 / 172

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.
Hard disk drive
activity LEDs
CD-ROM drive
activity LED
Diskette drive
activity LED
Hard disk drive
status LEDs
CD-eject button
Diskette-eject
button
Operator
information
panel
Power LED
Power control
button
Reset button
USB 1 connector
USB 2 connector
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.
Diskette-eject button: Press this button to release a diskette from the diskette
drive.
Hard disk drive activity LEDs: When either of these LEDs is flashing, it indicates
that the associated hard disk drive is in use.
Power LED: When this LED is lit, it indicates that ac and dc power are present in
the server. When this LED is flashing, it indicates that the server is in Standby
mode. When this LED is off, 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 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.
USB connectors: Connect USB devices to these connectors.
Hard disk drive status LEDs: When either of these LEDs is lit, it indicates that the
associated hard disk drive has failed. If an optional RAID adapter is installed in the
server and the LED flashes slowly (one flash per second), the drive is being rebuilt.
If the LED flashes rapidly (three flashes per second), the controller is identifying the
drive.
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xSeries 335 Type 8676, Type 8830: Hardware Maintenance Manual and Troubleshooting Guide