IBM xSeries 235, Техническое обслуживание и устранение неисправностей

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No-beep symptoms
Note: See “System” on page 156 to determine which components should be replaced by a field service technician.
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 the Configuration/Setup Utility program, and set the Start Options
Power-On Status to enable.
2. Check the speaker connection.
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 cage assembly.
4. Hot-swap power ac inlet box.
No beep and no video
v See “Undetermined problems” on page 151.
System will not start (power
supply ac LED is on)
v
See “Power-supply LED errors” on page 141.
Diagnostic panel system error LED
The system-error LED is lit when an error is detected. If the system-error LED is lit,
remove the cover and check the diagnostic panel LEDs. The following table is a
complete list of diagnostics panel LEDs followed by the FRU or action for correcting
the problem. The information in the table is valid only when the system-error LED is
lit.
Notes:
1. If a diagnostics panel LED is lit and the information LED panel system-error
LED is off, there is probably an LED problem. Run LED diagnostics.
2. To locate the LEDs on the system board, see “System-board LED locations” on
page 49.
3. Check the System Error Log for additional information before replacing a FRU.
4. The DIMM error LEDs, microprocessor error LEDs, and VRM error LEDs turn
off when the system is turned off.
Note: See “System” on page 156 to determine which components should be replaced by a field service technician.
Diagnostics 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 log for failure; clear PFA alert; remove ac power for at
least 20 seconds, reconnect, then turn on the system.
3. Run light path diagnostics.
MEMORY LED on (The LED next
to the failing DIMM is on.)
1. Failing DIMM
2. System board
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xSeries 235 Type 8671: Hardware Maintenance Manual and Troubleshooting Guide