No Beep Symptoms; Diagnostic Panel Leds - IBM 866631Y - Netfinity 7100 - 8666 Hardware Maintenance Manual

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
122
Hardware Maintenance Manual: Netfinity 7100 – Type 8666
Beep/Symptom FRU/Action
Three Short Beeps
1. DIMM
2. Processor/PCI Board
3. I/O Legacy Board
One Continuous
1. Processor
Beep
2. Optional Processor (if installed)
3. Processor/PCI Board
4. I/O Legacy Board
Repeating Short
1. Keyboard
Beeps
2. I/O Legacy Board
One Long and One
1. Video adapter (if present)
Short Beep
2. I/O Legacy Board
One Long and Two
1. Video adapter (if present)
Short Beeps
2. I/O Legacy Board
Two Long and
1. Video adapter
Two Short Beeps
No Beep Symptom
No beep and the system
operates correctly.
No Beeps occur after
successfully completing
POST (The Power-On
Status is disabled.)
No ac power(Power
supply ac LED is off)
No beep and no video
System will not
power-up (Power supply
ac LED is on)
LED is off, there is probably an LED problem. Run LED diagnostics.
FRU/Action
1. Diagnostic LED Panel
1. Run Configuration/Setup, set the Start Options Power-On
Status to enable.
2. Diagnostic LED Panel
3. I/O Legacy Board
1. Check the power cord.
2. Power Supply (If two are installed, swap them to determine
if one is defective.)
3. Power Backplane
1. See "Undetermined problems" on page 142
1. See"Power supply LED errors" on page 131