IBM x3400 7975 Problem Determination And Service Manual page 38

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, System x3400 Types 7973, 7974, 7975 and 7976," on page 87 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
3-3-3
Two short beeps
20
System x3400 Types 7973, 7974, 7975, and 7976: Problem Determination and Service Guide
Description
No operational memory in system.
Information only, configuration has
changed.
Action
1. Make sure that the system board contains
the correct number and type of DIMMs;
install or reseat the DIMMS; then, restart
the server.
Important: In some memory
configurations, the 3-3-3 beep code might
sound during POST, followed by a blank
monitor screen. If this occurs and the Boot
Fail Count option in the Start Options of
the Configuration/Setup Utility program is
enabled, you must restart the server three
times to reset the configuration settings to
the default configuration (the memory
connector or bank of connectors enabled).
2. Replace the following components one at a
time, in the order shown, restarting the
server each time:
a. DIMMs
b. (Trained service technician only) System
board
1. Run the Configuration/Setup Utility program.
2. Run the diagnostic programs.