IBM 7940, Problem Determination And Service Manual

Page: 23 / 160

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, LEDs, and connectors on the front of
the server. Except for the CD or DVD drive activity LED, the CD-eject or DVD-eject
button, and the rack release latches, these controls, LEDs, and connectors are on
the operator information panel.
Power-control button
Reset button
Power-on LED
Hard disk drive activity LED
System-error LED
USB port connectors (2)
CD-eject or DVD-eject button CD or DVD drive activity LED
System locator LED
Rack release latch Rack release latch
CD or DVD drive activity LED: When this LED is lit, it indicates that the CD drive
or DVD drive is in use.
CD-eject or DVD-eject button: Press this button to release a CD from the CD
drive or a DVD from the DVD drive.
Rack release latches: Each side of the front of the server has a rack release latch.
Press these latches to remove the server from the rack.
Operator information panel: This panel contains controls, LEDs, and connectors.
The following illustration shows the operator information panel.
Power-control button
Power-control button shield
Reset button
Power-on LED (green)
Hard disk drive activity LED (green)
System-error LED (amber)
Locator LED (blue)
USB connectors (2)
The following controls, LEDs, and connectors are on the operator information panel:
v
Power-control button: Press this button to turn the server on and off manually.
You might have to use a pen or the end of a straightened paper clip to press the
button.
A power-control-button shield comes with the server. You can install it to prevent
the server from being turned off accidentally.
Chapter 1. Introduction
5