IBM 306m - eServer xSeries - 8849, Service Manual

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Server controls, LEDs, and connectors
This section describes the controls, light-emitting diodes (LEDs), and connectors on
the front and rear of the server.
Front view
The following illustration shows the controls, light-emitting diodes (LEDs), and
connectors on the front of the server.
Power-on LED
Power-control button
Reset button
Hard disk drive activity LED
Locator LED
System-error LED
USB 1 connector
USB 2 connector
CD-eject button
CD 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 cord from the electrical outlet.
Power-control button: Press this button to turn the server on and off manually. A
power-control-button shield comes installed around the button to prevent the server
from being turned off accidentally. You can remove this disk-shaped shield if you
prefer.
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.
Hard disk drive activity LED: When this LED is flashing, it indicates that a hard
disk drive is in use.
Locator LED: When this LED is lit, it has been lit remotely by the system
administrator to aid in visually locating the server.
System-error LED: When this LED is lit, it indicates that a system error has
occurred.
USB connectors: Connect a USB device to either of these connectors.
CD-eject button: Press this button to release a CD from the CD drive.
CD drive activity LED: When this LED is lit, it indicates that the CD drive is in use.
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IBM xSeries 306m Types 8849 and 8491: Problem Determination and Service Guide