Front Panel And System Board Leds; Diagnostic Leds - IBM 8645 - Eserver xSeries 220 Hardware Maintenance Manual

Front panel and system board LEDs

The server does not contain a diagnostic or information panel. The system error
LED is on the front panel inside the server. All of the remaining error LEDs are on
the system board, adjacent to the failing components. See "Diagnostic LEDs" for
information on identifying problems using these LEDs.
The meanings of these LEDs are as follows:
CPU1
CPU2
Fan 1
Fan 2
MEM1
MEM 2
MEM 3
MEM 4
VRM1
VRM2
Notes:
1. The fan and VRM LEDs will illuminate only if the optional system
2. The server does not support user-replaceable power supplies or fans.

Diagnostic LEDs

You can use the diagnostic LEDs built into the server to quickly identify the type
of system error that occurred. The server is designed so that LEDs remain
illuminated when the server shuts down, as long as the power supply is operating
properly. This feature helps you to isolate the problem if an error causes the server
to shut down. To correct specific problems, see "Symptom-to-FRU index" on
page 105.
Table 2. Diagnostic LEDs
System Error LED (on the front
panel)
On
A system error was detected. Check to
see which of the LEDs on the system
board are on.
On
On
On
On
18
Hardware Maintenance Manual: xSeries 220 Type 8645
Microprocessor number 1 (connector U12) fault
Microprocessor number 2 (connector U11) fault
Fan number 1 (connector J10) failure (see note 1)
Fan number 2 (connector J18) failure (see note 1)
DIMM number 1 (connector J19) fault
DIMM number 2 (connector J21) fault
DIMM number 3 (connector J23) fault
DIMM number 4 (connector J26) fault
Microprocessor VRM number 1 (connector J42) fault (see note 1)
Microprocessor VRM number 2 (connector J12) fault (see note 1)
management adapter is installed in the server.
System board LED
None
MEM1, MEM2, MEM3, or MEM4
(system board)
CPU1 or CPU2 (system board)
Fan 1 or Fan 2
VRM1 or VRM2 (system board)
Cause
The system error log is 75% or more
full or a Predictive Failure Analysis
(PFA) alert was logged.
A memory error occurred.
One of the microprocessors has
failed, or a microprocessor is
installed incorrectly.
One of the fans has failed or is
operating too slowly.
One of the microprocessor VRMs has
failed, or a microprocessor VRM is
installed in the wrong connector.