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Light path LED errors - IBM eServer xSeries 445

Troubleshooting


Problem

Before replacing any part observe LEDs on system boards and view the System-Error log.

Resolving The Problem

Before replacing any FRU: Observe LEDs on boards. View System-Error log.
Note: For 16-way configuration, each chassis must be powered on as a standalone server to observe the LEDs for the boards of that chassis.

Level 1 light path

The level 1 light path consists of the system-error LED on the front panel (see "Light path diagnostics" on page 58 of the HMM).

Level 2 light path

The level 2 light path consists of the light path diagnostics panel (see Figure 19 on page 59 of the HMM).

Level 2 light path LED FRU/Action
All LEDs off (error log full)
Note: Event Log LED may be lit.
  1. System-Error log is 75% full; analyze the log entries to determine the nature of the error messages.
  2. Save and/or clear the log.
  3. For a PFA alert, check error log for failures.
  4. To clear a PFA alert; remove ac power for at least 20 seconds; then, reconnect and power up system.
CPU (failed microprocessor)
Note: Verify correct installation sequence; see "Installing and replacing a microprocessor" on page 104 of the HMM.

Check event log or follow level 3 light path chart (click Level 3 light path) to determine location of failing level 4 light path LED (CPU).
MEMORY (memory error)

Check event log or follow level 3 light path chart (click Level 3 light path) to determine location of failing level 4 light path LED (DIMM).
DASD (hot-swap hard drive failure)
Note: If RAID system, refer to the HMM for the specific RAID adapter.
  1. Failing drive (reseat/replace).
  2. Be sure the fans are operating correctly and the air flow is good.
  3. SCSI backplane.
PCI -X BUS (adapter failure)
  1. Check System Error log.
  2. Failing adapter.
  3. PCI-X board.
FAN (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.
TEMP (temperature too high)
  1. If a fan LED is on, replace the fan.
  2. Ambient temperature must be within normal operating specifications. See "Features and specifications" on page 3 of the of the HMM.
  3. Examine System Error log.
    1. System over recommended temperature
    2. DASD over recommended temperature
      1. Overheating hard disk drive
      2. DASD backplane
    3. Microprocessor x over recommended temperature (where x is microprocessor number)
      1. Reseat microprocessor x and heat sink.
      2. Microprocessor x.
    4. Power supply fault / over temp
      • Failing power supply
    5. Operator information panel
NMI (nonmaskable interrupt)
Note: A PCI or MEM LED may also be on.
  1. See System Error log.
  2. If a PCI LED is on, follow the instructions for that LED.
  3. If MEM LED is on, follow the instructions for that LED.
  4. Restart the server.
BOARD (board failure)

See top cover LEDs to determine location of failing board.
EVENT LOG (non optimal condition)
  1. See System Error log.
  2. See Service Processor log.
POWER SUPPLY 1
  1. Power supply 1
  2. Top power board
POWER SUPPLY 2
  1. Power supply 2
  2. Top power board
VRM (VRM failure)

Check event log or follow level 3 light path chart (click Level 3 light path ) to determine location of failing level 4 light path LED (VRM).
NON REDUND (nonredundancy lost)
  1. If PS x LED is lit on light path diagnostics panel, follow instructions for that LED.
  2. Failing power supply.
OVER SPEC (power supplies' rating exceeded)
  1. Power supply
  2. Top power board

Level 3 light path

The level 3 light path consists of the LEDs on the top cover of the server (see Figure 20 on page 60 of the HMM).

Document Location

Worldwide

Operating System

Older System x:Operating system independent / None

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Document Information

Modified date:
23 January 2019

UID

ibm1MIGR-52957

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