System component status indicators
Status indicators on the LED card behind the processor housing assembly latches,
I/O board, and the Advanced System Management PCI Adapter can help identify
problems. The indicators are lit during POST to ensure that the indicators operate.
After POST completes, the indicators show the status of the component.
For the location of the status indicators, see “Removing the processor housing
assembly” on page 58, “I/O board component locations” on page 102, and
“Advanced System Management PCI adapter component locations” on page 101.
LED card (processor and DIMM) LEDs
The eight processor error LEDs and the 16 DIMM error LEDs are located on the
LED card, behind the processor housing assembly latches.
1. To locate these LEDs, remove the processor housing assembly (see
“Removing the processor housing assembly” on page 58) and open the
processor housing assembly latches.
2. To verify which processor is faulty, see step 6 on page 61 and the following
table.
3. To verify which DIMM is faulty, see the following table.
4. Reinstall the processor housing assembly (see “Reinstalling the processor
housing assembly” on page 67) and restart the server to clear the processor
error LEDs or DIMM error LEDs.
Notes:
1. The LED card is not a user-removable component. If the LED card requires
service, contact your IBM service technician, IBM reseller, or IBM marketing
representative.
2. For an illustration that contains the LED card, see “Removing the processor
housing assembly” on page 58.
3. For information about replacing processors, see “Installing or replacing a
processor” on page 60.
4. For information about replacing DIMMs, see “Installing DIMMs and memory
boards” on page 52.
Indicator
Description
Processor fail
LED
If a processor is present and has failed, the indicator for the connector (A1–A4
or B1–B4) is on.
Memory fail
LED
If a DIMM is present and has failed or is disabled, the indicator for the slot
(A1/J1–A16/J16 or B1/J1–B16/J16) is on.
PCI slot LEDs
The following table describes the PCI slot LEDs on the I/O board.
Chapter 6. Solving problems
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