IBM 7378, Problem Determination And Service Manual

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Troubleshooting tables
Use the troubleshooting tables to find solutions to problems that have identifiable
symptoms.
If you cannot find a problem in these tables, see “Running the diagnostic programs”
on page 97 for information about testing the server.
If you have just added new software or a new optional device and the server is not
working, complete the following steps before you use the troubleshooting tables:
1. Check the operator information panel and the light path diagnostics LEDs (see
“Light path diagnostics” on page 90).
2. Remove the software or device that you just added.
3. Run the diagnostic tests to determine whether the server is running correctly.
4. Reinstall the new software or new device.
DVD drive problems
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 4, “Parts listing, System x3400 M3 Types 7378 and 7379,” on page 141 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.
Symptom Action
The DVD drive is not
recognized.
1. Make sure that:
v The SATA channel to which the DVD drive is attached (primary or
secondary) is enabled in the Setup utility.
v
All cables and jumpers are installed correctly.
v
The signal cable and connector are not damaged and the connector pins are
not bent.
v
The correct device driver is installed for the DVD drive.
2. Run the DVD drive diagnostic programs.
3. Reseat the following components:
a. DVD drive
b. DVD drive cables
4. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. DVD drive
b. DVD drive and cables
c. (Trained service technician only) System board
A DVD is not working correctly.
1. Clean the DVD.
2. Run the DVD drive diagnostic programs.
3. Reseat the DVD drive.
4. Replace the DVD drive.
Chapter 3. Diagnostics
75