IBM x3550 Problem Determination And Service Manual page 123

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 7978 and 1913 server," on page 29 to determine which components are
CRUs and which components are FRUs.
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
Three short beeps
Description
No operational memory in system.
Possible memory error
Action
1. Make sure that the server contains the
correct number of DIMMs, in the correct
order; install or reseat 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. Reseat the DIMMs.
2. Locate the failing DIMMs:
a. Remove all the DIMMs from the server.
b. Beginning with the primary bank of
DIMM connectors, install one bank of
DIMMs at a time in the server,
restarting the server each time untill
the beep code error returns.
c. Rplace one pair of DIMMs at a time in
the failing bank with an identical pair of
known good DIMMs, restarting the
server after each pair, until the beep
code error returns.
d. Replace one DIMM at a time in the
failing pair with an identical known
good DIMM, restarting the server after
each DIMM, to identify the failed
DIMM. If the beep code error remains
after replacing both DIMMs, go to step
3b.
e. Repeat steps 2b through 2d until all
memory banks have been checked.
3. Replace the following components, one at
a time, in the order shown:
a. DIMMs
b. (Trained service technician only)
System board
Chapter 5. Diagnostics
105