Server Controls And Indicators; Front View - IBM XSERIES 255 TYPE 8685 Hardware Maintenance Manual And Troubleshooting Manual

Server controls and indicators

This section identifies the controls and indicators on the front and rear of your
server.

Front view

Tower and rack models
Power-control button
Notes:
1. The illustrations in this document might differ slightly from your hardware.
2. An amber LED illuminates when a system error or event has occurred. To
Power-on (system power) LED: When this green LED is on, system power is
present in the server. When this LED flashes, the server is in Standby mode (the
system power supply is turned off and ac current is present). When this LED is off,
a power supply, ac power, or an LED has failed.
Power-control button: Press this button to manually turn the server on or off or to
place the server in Standby mode (see "Standby mode" on page 8).
Power-control button shield: You can install this circular disk over the
power-control button to prevent accidental manual power-off. This disk is provided
with your server.
Reset button: Press this button to reset the server and run the power-on self-test
(POST).
ACT (activity) LED: This green LED is on when there is activity on the server.
INFO (system information) LED: When this amber LED is on, the server power
supplies are nonredundant, or some other noncritical event has occurred. The event
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xSeries 255 Type 8685: Hardware Maintenance Manual and Troubleshooting Guide
Reset button
Power-on LED
identify the error or event, check the LEDs on the light path diagnostics panel
located on the server (see "Light path diagnostics" on page 32), or review the
Error Log in the Configuration/Setup Utility program (see "Viewing error logs
from the Configuration/Setup Utility program" on page 28). For more information
about the Configuration/Setup Utility program, see "Choices available from the
Configuration/Setup Utility main menu" on page 11.
Activity LED
System information LED
System error LED
Hard disk drive
activity LED
Hard disk drive
status LED
Diskette drive
activity LED
Diskette-eject
button
CD-ROM drive
activity LED
CD-eject button