IBM 8646 Hardware Maintenance Manual - Page 26

System Error LED, on front panel, System board, Cause, Action, Table 2. Diagnostic LEDs

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Table 2. Diagnostic LEDs System Error LED System board (on front panel) LED On None A system error was detected. Check to see which of the LEDs on the system board are on. On DIMM1, DIMM2, DIMM3, or DIMM4 On CPU1 or CPU2 On Fan 1, Fan 2, Fan 3, or Fan 4 Cause Action The system error log is 75% or more full or a Predictive Failure Analysis (PFA) alert was logged. This could also be caused by a Processor terminal problem. Check the system error log and correct any problems. See "Choices available from the Configuration/Setup main menu" on page 30 for more information about clearing the error log. Disconnecting the server from all power sources for at least 20 seconds will turn off the system error LED. Check mounting of the processor sink fans. A memory error occurred. 1. Check the DIMM error LEDs on the system board. 2. Replace the DIMM indicated by the lit DIMM error LED. One of the microprocessors has failed, or a microprocessor is installed incorrectly. 1. Check the microprocessor error LEDs on the system board. If a microprocessor error LED is on for a microprocessor connector that has a terminator card installed instead of a microprocessor, the microprocessors are not installed in the correct order. See "Installing and removing a microprocessor" on page 61 for information about the correct order for installing microprocessors. Otherwise, continue with the next step. 2. Turn off the server, reseat the microprocessor indicated by the lit microprocessor LED, and restart the server. 3. If the problem persists, replace the microprocessor. One of the fans has failed or is operating too slowly. The LED on the failing fan will be lit. Replace the fan with the lit LED. 18 Hardware Maintenance Manual: xSeries 220 Type 8646

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Table 2. Diagnostic LEDs
System Error LED
(on front panel)
System board
LED
Cause
Action
On
A system error
was detected.
Check to see
which of the LEDs
on the system
board are on.
None
The system error log is 75% or more
full or a Predictive Failure Analysis
(PFA) alert was logged. This could
also be caused by a Processor
terminal problem.
Check the system error log and
correct any problems. See
“
Choices
available from the
Configuration/Setup main menu
”
on
page 30 for more information about
clearing the error log. Disconnecting
the server from all power sources
for at least 20 seconds will turn off
the system error LED. Check
mounting of the processor sink fans.
On
DIMM1, DIMM2,
DIMM3, or
DIMM4
A memory error occurred.
1.
Check the DIMM error LEDs on
the system board.
2.
Replace the DIMM indicated by
the lit DIMM error LED.
On
CPU1 or CPU2
One of the microprocessors has
failed, or a microprocessor is
installed incorrectly.
1.
Check the microprocessor error
LEDs on the system board. If a
microprocessor error LED is on
for a microprocessor connector
that has a terminator card
installed instead of a
microprocessor, the
microprocessors are not installed
in the correct order. See
“
Installing and removing a
microprocessor
”
on page 61 for
information about the correct
order for installing
microprocessors. Otherwise,
continue with the next step.
2.
Turn off the server, reseat the
microprocessor indicated by the
lit microprocessor LED, and
restart the server.
3.
If the problem persists, replace
the microprocessor.
On
Fan 1, Fan 2, Fan
3, or Fan 4
One of the fans has failed or is
operating too slowly.
The LED on the failing fan will be
lit. Replace the fan with the lit LED.
18
Hardware Maintenance Manual: xSeries 220 Type 8646