Operation Manual

Note: See Chapter 7, “Parts listing, Types 8861, 8862,” on page 139 to determine which components are
replaceable by the customer and which components must be replaced by an IBM field service technician.
Beep/symptom FRU/action
3-3-2 (Critical SMBUS error occurred)
1. Disconnect power cord, wait 30 seconds, retry.
2. DIMM.
3. Memory cassette.
4. Microprocessor tray assembly.
5. I/O board.
3-3-3 (No operational memory in system)
1. Verify that lower SMP Expansion Module contains correct
number of DIMMs; install or reseat DIMMS, then reboot.
2. DIMM.
3. Memory cassette.
4. Microprocessor tray assembly.
Two short beeps (information only,
configuration has changed)
1. Run Configuration/Setup.
2. Run diagnostic programs.
Three short beeps
1. DIMM
2. Memory cassette
3. Microprocessor tray assembly
One continuous beep
1. Microprocessor
2. Optional microprocessor
3. Microprocessor tray assembly
Repeating short beeps
1. Keyboard
2. I/O board
Repeating long beeps
v Reseat DIMMs.
One long and one short beep
1. I/O board
2. Center plane
One long and two short beeps
v I/O board
Two long and two short beeps
v I/O board
No beep symptoms
Note: See Chapter 7, “Parts listing, Types 8861, 8862,” on page 139 to determine which components are
replaceable by the customer and which components must be replaced by an IBM field service technician.
No beep symptom FRU/action
No beep and the system
operates correctly.
v Operator information panel
No beeps occur after
successfully completing POST
(Power-On Status is disabled.)
1. Run Configuration/Setup, set the Start Options Power-On Status to
enable.
2. Operator information panel.
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
v See “Undetermined problems” on page 136.
Chapter 6. Symptom-to-FRU index 87