IBM 8676 - Eserver xSeries 335 Hardware Maintenance Manual And Troubleshooting Manual page 93

Note: See "System" on page 112 to determine which components should be replaced by a field service technician.
Diagnostics panel LED
All LEDs off
(Check System Error Log for error
condition, then clear System Error
Log when the problem is found.)
CPU (Microprocessor failure. The
LED next to the failing CPU is on.)
CNFG (The microprocessor or
microprocessor VRM configuration
is incorrect.)
VRM LED on (A voltage regulator
module (VRM) failed. The LED next
to the failing VRM is on.)
MEM (System memory failed. The
LED next to the failing DIMM is on.)
SP (Integrated system
management processor (ISMP)
failed.)
PS (Power supply failed.)
TEMP (Temperature exceeded a
threshold level.)
FAN (A fan failed or is operating
slowly.)
FRU/action
1. System Error Log is 75% full; clear the log.
2. PFA alert; check log for failure; clear PFA alert; remove ac power for at least
20 seconds, reconnect, then turn on the system.
3. Run Light Path Diagnostics.
1. Failing microprocessor
2. System board
1. Verify that microprocessors are compatible (see "Installing a
microprocessor" on page 52).
2. If only one microprocessor is installed, make sure it is located in socket
U82.
3. Verify that VRM is present if two microprocessors are installed.
4. Microprocessor.
5. VRM.
1. Failing VRM
2. System board
1. Failing DIMM
2. System board
1. Unplug the server for 30 seconds, and then retry.
2. Reflash or update firmware for ISMP, BIOS.
3. System board.
1. Verify that fan near power supply has clear air flow, rerouting cables if
necessary.
2. Power supply.
3. System board.
1. Ambient temperature must be within normal operating specifications.
See "Features and specifications" on page 2.
2. Ensure fans are operating correctly.
3. Examine System Error Log.
a. System over recommended temperature
b. Power switch assembly
c. DASD over recommended temperature (DASD LED also on)
1) Overheating hard disk drive
2) DASD backplane
3) System board
d. System over recommended temperature for microprocessor x (where x
is 1 or 2) (CPU LED is also on)
1) Microprocessor x
2) System board
e. System board over recommended temperature
v System board
1. Check individual fan LEDs.
2. Replace respective fan.
3. System board.
Chapter 6. Symptom-to-FRU index
83