Lenovo ThinkServer RD120 Hardware Maintenance Manual page 145

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, ThinkServer RD120 Machine Types 6444, 6445, 6446, and 6447," 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
1-2-1
1-2-2
1-2-3
1-2-4
1-3-1
2-1-1
2-1-2
2-1-3
2-1-4
2-2-1
2-2-2
Description
Programmable interval timer failed.
DMA initialization failed.
DMA page register write/read failed.
RAM refresh verification failed.
1st 64K RAM test failed.
Secondary DMA register failed.
Primary DMA register failed.
Primary interrupt mask register failed.
Secondary interrupt mask register failed.
Interrupt vector loading failed.
Keyboard controller failed.
Action
(Trained service technician only) Replace the
system board.
(Trained service technician only) Replace the
system board.
(Trained service technician only) Replace the
system board.
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.
Replace the following components, one at a
time, in the order shown, restarting the server
each time:
1. Keyboard
2. (Trained service technician only) System
board
Chapter 5. Diagnostics
127