IBM 8671 - Eserver xSeries 235, Maintenance And Troubleshooting Manual

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Notes:
1. If a diagnostics panel LED is lit and the information LED panel system-error
LED is off, there is probably an LED problem. Run LED diagnostics.
2. To locate the LEDs on the system board, see “System-board LED locations” on
page 53.
3. Check the System Error Log for additional information before replacing a FRU.
4. The DIMM error LEDs, microprocessor error LEDs, and VRM error LEDs turn
off when the system is turned off.
Note: See “System” on page 162 to determine which components should be replaced by a field service technician.
Diagnostics panel LED FRU/action
All LEDs off
(Check System Error Log for error
condition, then clear System Error
Log when the problem is found.)
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.
MEMORY LED on (The LED next
to the failing DIMM is on.)
1. Failing DIMM
2. System board
CPU LED on (The LED next to the
failing CPU is on.)
1. Microprocessor 1 or 2
2. System board
PCI BUS LED on
1. Remove all PCI adapters from slots on affected bus (see “LEDs for
Active PCI slots” on page 36 for bus information, see “Adapter
considerations” on page 60).
2. System board.
VRM LED on (The LED next to the
failing VRM is on.)
1. Voltage regulator module indicated by the lit VRM LED.
2. Microprocessor indicated by the microprocessor LED.
DASD LED on (The LED located
next to the drive bay that the failing
drive is installed in is lit. Check the
amber drive LED for the failing hard
drive.)
1. Be sure the fans are operating correctly and the airflow is good.
2. If installed, reseat I2C cable between DASD backplane and DASD I2C on
the system board (J10).
3. Failing drive. SCSI channel A has failed. (This is the SCSI channel for the
hot-swap hard disk drives).
4. SCSI backplane.
SERVICE PROCESSOR BUS LED
1. Unplug the server for 30 seconds, and then retry.
2. Reflash or update firmware for ISMP, BIOS.
3. System board.
POWER SUPPLY 1 LED on
1. Check the dc good LED on power supply 1. If it is off, replace power
supply 1.
2. Power cage assembly, if installed.
POWER SUPPLY 2 LED on
1. Check the dc good LED on power supply 2. If it is off, replace power
supply 2.
2. Power cage assembly, if installed.
NONREDUNDANT LED on
1. Check the PS1 and PS2 LEDs and replace any indicated power supply.
2. Install an additional power supply or remove optional devices from the
server.
NMI LED on
1. Restart the server.
2. Check the System Error Log.
Chapter 6. Symptom-to-FRU index
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