IBM xSeries 440 8687, Hardware Maintenance Manual

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Light Path LED errors
Before replacing any FRU:
1. Run diagnostics and view System Error log.
2. Observe LEDs on boards.
Note: For 16-way configuration (models 1VX, 2VX, 3VX only), run diagnostics on
each chassis (boot up standalone), and observe the LEDs on the boards of
each chassis.
Level 1 light path
The level 1 light path consists of the system-error LED on the front panel (see
“Server controls and indicators” on page 7).
Level 2 light path
The level 2 light path consists of the light path diagnostics panel (see the illustration
at step 1 on page 54).
Level 2 Light Path LED FRU/action
All LEDs off (error log full)
Note: “See Log” LED may be lit.
1. System Error log is 75% full; clear the log.
2. PFA alert; check error log for failure; clear PFA alert; remove ac power for at
least 20 seconds, reconnect, then power up system.
3. Run diagnostics.
CPU LED on (failed processor)
Note: Verify correct installation
sequence; see “Microprocessors”
on page 95.
1. Microprocessor 1-8
2. SMP board
VRM LED on (VRM failure)
1. VRM 1-8
2. SMP board
DASD LED on (hot-swap hard
drive failure)
Note: If RAID system, refer to
Hardware Maintenance Manual for
the specific RAID adapter.
1. Run diagnostics.
2. Failing drive (reseat/replace).
3. Be sure the fans are operating correctly and the air flow is good.
4. SCSI backplane.
FAN LED on (fan failure)
Note: A failing fan can also cause
the TEMP and DASD LEDs to be
on.
1. Check individual fan LEDs.
2. Replace respective fan.
3. SMP board.
MEM LED on (memory error)
1. Check DIMM error LED on SMP board
Note: If there is a DIMM failure, an LED on the SMP board indicates the
failing DIMM. Be sure to check both lower and upper SMP Expansion
Module assemblies (if installed).
2. DIMM.
3. SMP board.
PCI LED on (adapter failure)
1. Check System Error log.
2. Failing adapter.
3. PCI-X board.
PS1 LED on
1. Power supply 1
2. Top power board
3. Centerplane
Symptom-to-FRU index
155