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.
Power-supply LEDs
Operator
information
panel
power-on
LED Description ActionAC DC
Off Off Off No power to the
server, or a problem
with the ac power
source.
1. Check the ac power to the server.
2. Make sure that the power cord is connected to a
functioning power source.
3. Remove one power supply at a time.
Lit Off Off DC source power
problem.
1. Remove one power supply at a time.
2. View the system error logs (see “Error logs” on
page 136).
Lit Lit Off Standby power
problem.
1. View the system error logs (see “Error logs” on
page 136).
2. Remove one power supply at a time.
3. Replace the power backplane.
Lit Lit Lit The power is good. No action is necessary.
Diagnostic programs, messages, and error codes
The diagnostic programs are the primary method of testing the major components
of the server. As you run the diagnostic programs, text messages and error codes
are displayed on the screen and are saved in the test log. A diagnostic text
message or error code indicates that a problem has been detected; to determine
what action you should take as a result of a message or error code, see the table in
“Diagnostic error codes” on page 170.
Running the diagnostic programs
To run the diagnostic programs, complete the following steps:
1. If the server is running, turn off the server and all attached devices.
2. Turn on all attached devices; then, turn on the server.
3. When the prompt F2 for Diagnostics appears, press F2. If you have set both a
power-on password and an administrator password, you must type the
administrator password to run the diagnostic programs.
4. From the top of the screen, select either Extended or Basic.
5. From the diagnostic programs screen, select the test that you want to run, and
follow the instructions on the screen.
When you are diagnosing hard disk drives, select SCSI Attached Disk Test for
the most thorough test. Select Fixed Disk Test for any of the following
situations:
v You want to run a faster test.
v The server contains RAID arrays.
168 ThinkServer RD120 server Machine Types 6444, 6445, 6446, and 6447: Hardware Maintenance Manual
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