IBM Netfinity 4500R, Hardware Maintenance Manual

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Hardware Maintenance Manual: Netfinity 4500R Type 8656
No Beep symptoms
Information panel system error LED
The system error LED is turned 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 correcting the
problem. The following chart is valid only when the system error LED is on.
Note:
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 system board see “System board LED locations” on
page 44.
2. Check the System Error Log for additional information before replacing a FRU.
3. The DIMM error LEDs, processor error LEDs, and VRM error LEDs turn off when
the system is powered down.
No Beep Symptom FRU/Action
No beep and the system
operates correctly. 1. Check speaker cables
2. Speaker
3. System Board
No Beeps occur after
successfully completing
POST
(The Power-On Status is
disabled.)
1. Run Configuration/Setup, set the Start Options Power-On
Status to enable.
2. Check speaker connectionl
3. System Board
No ac power
(Power supply ac LED is
off)
1. Check the power cord.
2. Power Supply (If two are installed, swap them to determine
if one is defective.)
3. Power Backplane
4. Hot-Swap Power AC Inlet Box
No beep and no video 1. See “Undetermined problems” on page 133
System will not power-
up
(Power supply ac
LED is on)
1. See“Power supply LED errors” on page 121
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; check Netfinity log for failure; clear PFA alert;
remove AC power for at least 20 seconds, reconnect, then
power up system.
3. Run Information Panel diagnostics.
CPU LED on
(The LED next to the failing
CPU should be on.)
1. Processor 1 or 2.