IBM 4364, 4365 Chapter 3. Server controls, LEDs, and power

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, 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 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.

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: This LED can be lit remotely by the system administrator to aid in

visually locating the server. You can use IBM Director to light this LED remotely.

System-error LED: When this 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 29 for additional information.