IBM 8490, 8485 manual Server controls, LEDs, and power, Front view

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.

Power-on

LED

Power-control button

Hard disk drive activity LED

System-error

LED

USB connectors

CD-eject or

DVD-eject button

CD or DVD drive activity LED

(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.

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