Power problems

Use the following table to find out how to begin analyzing a power problem.

Table 1. Analyzing power problems
Symptom	What you should do
There may or may not be a reference code displayed on the control panel, the Hardware Management Console (HMC, or on the Advanced System Management Interface (ASMI). Perform the following steps to check the HMC for codes: In the Navigation Area, expand Server and Partition > Server Management. In the right pane, expand or select your system or partition. View the associated value in the Operator Panel Value column. To check the ASMI for codes, select Error/Event Logs from the menu.	Record the reference code shown. Go to (1xxx) System power control network (SPCN) reference codes and find the reference code. Integrated xSeries® Server for iSeries® frames will only have the frame number flashing on the failing unit's SPCN card assembly, which is visible after removing the cover.
System unit does not power on.	See Cannot power on system unit.
The system or expansion unit does not power off.	See Cannot power off system or SPCN-controlled I/O expansion unit.
The system does not remain powered on during a loss of incoming ac voltage and has an Uninterruptible Power Supply (UPS) installed.	Refer to the UPS user's guide that came with your unit.
An I/O expansion unit does not power on.	See Cannot power on SPCN-controlled I/O expansion unit.