IBM 8685 Hardware Maintenance Manual - Page 142

No-beep symptoms, Diagnostic panel system error LED, Run the Configuration/Setup Utility program

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Page 142 highlights

Note: See "System" on page 162 to determine which components should be replaced by a field service technician. Beep/symptom FRU/action 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 162 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 146. 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. 132 xSeries 255 Type 8685: Hardware Maintenance Manual and Troubleshooting Guide

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Note:
See “System” on page 162 to determine which components should be replaced by a field service technician.
Beep/symptom
FRU/action
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 162 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 146.
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.
132
xSeries 255 Type 8685: Hardware Maintenance Manual and Troubleshooting Guide