IBM TotalStorage NAS 300, Справочник пользователя

Страница: 141 / 200

2. To locate the LEDs on the system board see Figure 12 on page 129.
3. Check the System Event/Error Log for additional information before replacing a
FRU.
4. The DIMM-error LEDs, processor-error LEDs, and VRM-error LEDs turn off
when the system is shut down.
Table 21. Errors diagnosed by the diagnostic panel LEDs
Diagnostics panel LED Part/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, and 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 (refer to “Adapters” in
Chapter 3 of the hardware installation guide).
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 that the fans are operating correctly and the airflow is good.
2. If installed, reseat I
2
C cable between DASD backplane and DASD I
2
C 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 power supplies from the engine for 30 seconds, and then plug in
and 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.
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.
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
engine.
NMI LED on
1. Restart the engine.
2. Check the System Error Log.
Appendix D. Symptom-to-part index
127