Powering the System On and Off
The system can be powered on after the following cables are connected:
v V/S COMM Cable
v All RIO cables
v All SPCN cables
v JTAG Cable
v All PCI cables to supported drawers
After
the required cables are installed, and the power cables are connected, the power button on the
primary I/O drawer operator panel can be pushed to initialize the system. Progress indicators, also referred
to as checkpoints, are visible on the primary I/O drawer operator panel display and the power LED on the
primary I/O drawer stops blinking and stays on, indicating the system power is on.
The CEC drawer and secondary I/O drawers are powered on through the primary I/O drawer system
power control network (SPCN). When power is applied, the power LEDs on the primary I/O drawer go
from blinking to on continuously, and the power LED on the CEC drawer and secondary I/O drawer(s)
comes on and stays on. This indicates that power levels are satisfactory in the drawers.
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 pressing the power button on the primary I/O drawer
operator panel.
Attention: Using the power button on the operator panel to power off the system can cause
unpredictable results in the data files, and the next IPL will take longer to complete.
For complete details on how to power on and off the system, go to “Powering Off and Powering On the
System” on page 415 and “System Power-On Methods” on page 386.
Chapter 1. Reference Information 5
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