Lenovo ThinkServer TD100 Hardware Maintenance Manual page 167

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, TD100 Types 6398, 6399, 6419, 6429, 4203, and 4206," on page 25 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
1-2-4
1-3-1
2-1-1
2-1-2
2-1-3
2-1-4
2-4-1
3-1-1
3-1-2
Description
RAM refresh verification failed.
First 64 K RAM test failed.
Secondary DMA register test failed.
Primary DMA register test failed.
Primary interrupt mask register test
failed.
Secondary interrupt mask register test
failed.
Video failed, system believed to be
operable.
Timer interrupt test failed.
Timer 2 test failed.
Action
1. Reseat the DIMMs.
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. Replace the lowest-numbered pair of
DIMMs with an identical known good pair of
DIMMs; then, restart the server. If the beep
code error remains, go to 3b. Return one
DIMM at a time from the failed pair to its
connector, restarting the server after each
DIMM to identify the failed DIMM.
3. 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.
(Trained service technician only) Replace the
system board.
(Trained service technician only) Replace the
system board.
(Trained service technician only) Replace the
system board.
(Trained service technician only) Replace the
system board.
(Trained service technician only) Replace the
system board.
(Trained service technician only) Replace the
system board.
(Trained service technician only) Replace the
system board.
Chapter 5. Diagnostics
149