IBM System x3950 Type 8878 Service Manual page 85

v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See Chapter 3, "Parts listing, Type 8878 and 8879," on page 23 to determine which components are
customer replaceable units (CRU) and which components are field replaceable units (FRU).
v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
Beep code
Three short beeps
One continuous beep
Repeating short beeps
Repeating long beeps
Description
Memory error.
Microprocessor error.
Keyboard error.
Memory error.
Action
Note: Make sure you re-enable the memory in
the Configuration/Setup Utility program. See,
"Memory problems" on page 94
1. Reseat the following components:
a. DIMM
b. Memory card
c. Microprocessor tray
2. Replace the following components one at a
time, in the order shown, restarting the
server each time.
a. DIMM
b. Memory card
c. (Trained service technician only)
Microprocessor tray
1. Reseat the following components:
a. (Trained service technician only)
Microprocessor
b. (Trained service technician only)
Optional microprocessor
c. Microprocessor tray
2. Replace the following components one at a
time, in the order shown, restarting the
server each time.
a. (Trained service technician only)
Microprocessor
b. (Trained service technician only)
Optional microprocessor
c. (Trained service technician only)
Microprocessor tray
1. Reseat the following components:
a. Keyboard
b. I/O board
2. Replace the components listed in step 1
one at a time, in the order shown, restarting
the server each time.
Reseat the DIMMs.
Chapter 5. Diagnostics
69