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Diagnostic panel system error LEDs - IBM eServer xSeries 235

Troubleshooting


Problem

This document is intended for trained servicers who are familiar with IBM Personal Computer products. Use this document along with advanced diagnostic tests to troubleshoot problems effectively.

Resolving The Problem

This document is intended for trained servicers who are familiar with IBM Personal Computer products. Use this document along with advanced diagnostic tests to troubleshoot problems effectively. Before servicing an IBM product, be sure to review the safety information. Click here to review safety information.

The system-error LED is lit when an error is detected. If the system-error LED is lit, remove the cover and check the diagnostic panel LEDs. The following table is a complete list of diagnostics panel LEDs followed by the FRU or action for correcting the problem. The information in the table is valid only when the system-error LED is lit.

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 49 in the Hardware Maintenance Manual (HMM).
  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 156 in the HMM 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 32 for bus information; see “Adapter considerations” on page 57 in the HMM)
  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
TEMPERATURE LED on

 

  1. Ambient temperature must be within normal operating specifications. See “Features and specifications” on page 2 in the HMM.
  2. Ensure fans are operating correctly.
  3. Examine System Error Log.
    1. System over recommended temperature
      • Information LED panel
    2. DASD over recommended temperature (DASD LED also on)
      • Overheating hard drive
      • DASD backplane
    3. System over recommended temperature for CPU x (where x is 1 or 2) (CPU LED is also on)
      1. CPU x
      2. System board
  5. If the CPU LED on the diagnostics panel is also lit, one of the microprocessors has caused the error.
 
FAN LED on
  1. Check individual fan LEDs
  2. Replace respective fan
  3. Fan cable
  4. System board
  5. Power cage assembly, if installed

 

Document Location

Worldwide

Operating System

Older System x:Operating system independent / None

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Document Information

Modified date:
28 January 2019

UID

ibm1MIGR-43226

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