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146 Hardware Maintenance Manual: xSeries 250
No beep symptoms
Diagnostic panel LEDs
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.
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 processor board see “Processor board component
locations” on page 55.
2. Check the System Error Log for additional information before replacing a FRU.
3. It may be necessary to view the system error log from a remote connection, such
as MOST.
Repeating Short Beeps 1. Keyboard
2. I/O Legacy Board
One Long and One Short
Beep
1. Video adapter (if present)
2. I/O Legacy Board
One Long and Two Short
Beeps
1. Video adapter (if present)
2. I/O Legacy Board
Two Long and Two Short
Beeps
1. Video adapter
No Beep Symptom FRU/Action
No beep and the system
operates correctly.
1. Diagnostic LED Panel
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. Diagnostic LED Panel
3. I/O Legacy 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
No beep and no video 1. See “Undetermined problems” on page 170
System will not power-
up (Power supply ac
LED is on)
1. See“Power supply LED errors” on page 154
Beep/Symptom FRU/Action