Lenovo ThinkServer RD120 Hardware Maintenance Manual page 152

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
One long and two short
beeps
One long and three short
beeps
Two long and two short
beeps
No-beep symptoms
The following table describes situations in which no beep code sounds when POST
is completed.
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ThinkServer RD120 server Machine Types 6444, 6445, 6446, and 6447: Hardware Maintenance Manual
Description
Possible video controller problem.
Problem with the monitor or video
controller.
Problem with the optional video adapter.
Action
1. Reseat the optional video adapter (if
installed).
2. Replace the following components, one at
a time, in the order shown, restarting the
server each time:
v Video adapter (if installed)
v (Trained service technician only) System
board
1. Reseat the following components, one at a
time, in the order shown, restarting the
server each time:
a. Monitor cable
b. Optional video adapter (if installed).
2. Replace the following components, one at
a time, in the order shown, restarting the
server each time:
a. Monitor
b. Optional video adapter (if installed)
c. (Trained service technician only)
System board
1. Reseat the optional video adapter.
2. Replace the optional video adapter.