IBM 88371RU, Maintenance And Troubleshooting Manual

Page: 104 / 186

Note: See “System replaceable units” on page 122 to determine which components should be replaced by a field
service technician.
Diagnostics panel LED FRU/action
PS1 (power supply 1: lit=failure or
removal; flashing=invalid power
supply configuration)
1. Make sure power supply 1 is installed correctly.
2. Power supply 1.
3. Power backplane.
PS2 (power supply 2: lit=failure or
removal; flashing=invalid power
supply configuration)
1. Make sure power supply 2 is installed correctly.
2. Power supply 2.
3. Power backplane.
CPU (microprocessor: lit=failure
(LED next to the failing
microprocessor is on);
flashing=invalid microprocessor
configuration)
1. Make sure microprocessors are compatible (see “Microprocessor
considerations” on page 36).
2. Failing microprocessor.
3. System board.
VRM (VRM: lit=failure (LED next to
the failing (second) VRM might be
on); flashing=invalid VRM
configuration)
1. Make sure VRMs are installed correctly.
2. Failing VRM.
3. System board.
CNFG (flashes to indicate invalid
configuration exists; error LED next
to failing component might also be
flashing)
1. Make sure that DIMMs, microprocessors, and VRMs are installed
correctly and are of the correct type (see “Memory module
considerations” on page 32 and “Microprocessor considerations” on
page 36).
2. Run the Configuration/Setup Utility program and make sure DIMMs,
microprocessors, and VRMs are configured correctly.
3. Failing component (check system-error log and BMC log).
MEM (memory: lit=failure (LED next
to failing DIMM is on);
flashing=invalid DIMM configuration
failure))
1. Make sure DIMMs are installed correctly.
2. Failing DIMM.
3. System board.
NMI (non-maskable interrupt
occurred)
1. Make sure that the operating system is installed correctly and that any
service pack updates have been installed.
2. Make sure that all device drivers, firmware, and BIOS code are at the
current level.
3. System board.
S ERR (a soft error has occurred)
1. Make sure that the operating system is installed correctly and that any
service pack updates have been installed.
2. Make sure that all device drivers, firmware, and BIOS code are at the
current level.
3. System board.
SP (service processor failure)
1. Shut down server and disconnect power cords for 30 seconds; then,
reconnect power cords and restart server.
2. System board.
DASD (hard disk drive failure (the
drive LED, if supported, near the
failing drive is lit))
1. Be sure the fans are operating correctly and the airflow is good so
that the drive is not overheating.
2. Hard disk drive.
3. SCSI backplane.
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xSeries 336 Type 1879 and Type 8837: Hardware Maintenance Manual and Troubleshooting Guide