IBM XSERIES 255 TYPE 8685, Hardware Maintenance Manual And Troubleshooting Manual

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Note: See “System” on page 160 to determine which components should be replaced by a field service technician.
Beep/symptom FRU/action
One continuous beep
1. Microprocessor
2. Optional microprocessor (if installed)
3. System board
Repeating short beeps
1. Keyboard
2. System board
One long and one short beep
1. Video adapter (if installed)
2. System board
One long and two short beeps
1. Video adapter (if installed)
2. System board
One long and three short beeps
1. Monitor
2. Video adapter, if installed
3. System board
Two long and two short beeps
v Video adapter
No-beep symptoms
Note: See “System” on page 160 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 backplane.
4. Hot-swap power ac inlet box.
No beep and no video
v See “Undetermined problems” on page 157.
System will not start (power
supply ac LED is on)
v
See “Power-supply LED errors” on page 145.
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.
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xSeries 255 Type 8685: Hardware Maintenance Manual and Troubleshooting Guide