IBM 866251Y - Netfinity 5500 M20, Hardware Maintenance Manual

Page: 298 / 386

Information panel system error LED
The system error LED is turned on on when an error is
detected. If the system error LED is on, remove the cover
and check the diagnostic panel LEDs. The following is a
complete list of diagnostic panel LEDs followed by the
FRU/Action for replacing the problem.
Important
If a diagnostic panel LED is on and the information
LED panel system error LED is off, there is probably
an LED problem. Run LED diagnostics.
Notes
1. To locate the LEDs on the processor board see
“Processor board component locations” on
page 254.
2. Check the System Error Log for additional
information before replacing a FRU.
3. The memory board DIMM error LEDs, processor
error LEDs, and VRM error LEDs turn off when
the system is powered down.
Diagnostic 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; power the
system off then on
3. Run Information Panel
diagnostics
Only CPU LED on
(The LED next to the failing
CPU should be on.) 1. Processor 1, 2, 3, or
4
2. Processor Board
CPU LED and VRM LED
on
(The LED next to the failing
VRM should be on.) 1. Voltage regulator
module indicated by
the VRM LED on the
processor board that
is turned on
2. Processor indicated by
the Processor LED.
3. Processor Board
CPU Wrong Slot LED on
(CPU and terminator card
installation order is wrong.) 1. CPU and terminator
card installation
order
See“Microprocessor
installation” on
page 238 .
2. Processor(s)
3. Processor Board
DASD 1 LED on
(The LED located next to
the drive bay that the failing
drive is installed in will be
turned on.) 1. Failing drive.
2. Be sure the fans are
operating correctly and
the air flow is good.
3. SCSI Backplane
290
Netfinity Server HMM