Specifications

Powering Off and Powering On the System
This section provides procedures for powering off and powering on the system.
Powering Off the System
If the system is operating under AIX, type the shutdown command to power off the
system.
If you cannot use this method, you can power off the system by using the following
operator-panel power button procedure:
Attention: Using the operator-panel power button to power off the system might
cause unpredictable results in the data files, and the next IPL will take longer to
complete.
1. Open the access door.
2. Press the power button on the operator panel.
B0FF appears in the operator panel display. The operator panel power LED starts
blinking at a fast rate.
When the power-off sequence is complete, the system goes into standby power mode,
as evidenced by the following:
v OK displays in the operator panel display.
v The operator panel power LED starts blinking at a slow rate.
Powering On the System
Perform the following steps to power on the system:
1. Open the access door. Look for OK on the operator panel display, which indicates
that the system is in standby mode.
2. Press the power button on the operator panel.
The power LED on the operator panel starts blinking at a fast rate. Checkpoint
codes (9xxx) appear in the operator panel display. For details, see “IPL Flow” on
page 77.
When the power-on sequence is complete, the power LED on the operator panel stops
blinking and stays on.
Powering Off and Powering On the System Using the Service Processor
The system can be powered off and on using the System Power Control menu, which is
a service processor menu that is available to the privileged user. See “System Power
Control Menu” on page 254.
8 Service Guide