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Attention:
Using the power button on the operator panel or commands at the HMC to power off the
system can cause unpredictable results in the data files. The next IPL will also take longer to complete if
all applications in all partitions are not stopped before hand.
Starting the System Without an HMC Attached
Power on the system only after all of the following steps are completed:
v All I/O drawer cables are connected
v Base system cables are connected
v All PCI cables to supported subsystems are connected
v The hardware management console (HMC) is connected (if required)
v Power is connected to the system
To power on the system, perform the following steps in sequence.
1. Open any system or rack doors necessary to allow the operator panel to be observed.
2. Connect the power source to the system unit.
Before you press the power button on your operator panel, observe the following:
v The power LED is slowly blinking.
v An OK prompt is visible in the operator panel display.
3. Press the power-on button on the operator panel.
After pressing the power button located on the operator panel, observe the following:
a. The power LED begins to blink visibly faster.
b. The system cooling fans are activated and begin to accelerate up to operating speed.
Note: There is approximately a 30-second transition period between the time the power button is
pressed and the power LED remains on solid (no longer blinking).
c. The power LED stays on solid and progress indicators, also referred to as checkpoints, are visible
on the operator panel display.
Starting the System With an HMC Attached
Power on the system only after all of the following steps are completed:
v All I/O drawer cables are connected
v Base system cables are connected
v All PCI cables to supported subsystems are connected
v The hardware management console (HMC) is connected (if required)
v Power is connected to the system
After the required cables are installed and the power cables are connected, the HMC user interface
provides a power-on function to turn on the power to the system. If a system operator panel is available,
the power button on the operator panel can be pushed to initialize the system but the preferred method is
to use the HMC if booting logical partitions. Progress indicators, also referred to as checkpoints, are visible
on the operator panel display (if available) as the system power is turned on. The power LED on the base
system stops blinking and stays on, indicating the system power is on.
The base system and I/O subsystems are powered on through the system power control network (SPCN).
When power is applied, the power LEDs on the base system go from blinking to continuous, and the
power LEDs on the I/O subsystem(s) come on and stay on. This indicates that power levels are
satisfactory in the subsystems.
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EserverpSeries 650 Service Guide
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