IBM 7940, Руководство по диагностике и обслуживанию

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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, Type 7940 and 7941 servers,” on page 19 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 CD or DVD is not working
correctly.
1. Clean the CD or DVD drive.
2. Run the CD or DVD drive diagnostic programs (see “Running the diagnostic
programs” on page 101).
3. Check the connector and signal cable for bent pins or damage.
4. Reseat the following components one at a time, in the order shown, restarting
the server each time:
a. CD or DVD drive
b. CD or DVD drive cable
5. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. CD or DVD drive
b. CD or DVD drive cable
c. CD or DVD drive backplane
d. (Trained service technician only) System board
The CD or DVD drive tray is not
working.
1. Make sure that the server is turned on.
2. Insert the end of a straightened paper clip into the manual tray-release
opening.
3. Reseat the CD or DVD drive cable.
4. Replace the CD or DVD drive.
General 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 3, “Parts listing, Type 7940 and 7941 servers,” on page 19 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
An LED is not working, or a
similar problem has occurred. If the part is a CRU, replace it. If the part is a FRU, the part must be replaced by a
trained service technician.
Chapter 5. Diagnostics
87