IBM ThinkPad 390E, Hardware Maintenance Manual

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Symptom-to-FRU Index
The Symptom-to-FRU Index lists the symptoms and errors
and the possible causes. The most likely cause is listed
first.
Note: Perform the FRU replacement or actions in the
sequence shown in the FRU/Action columns. If a
FRU replacement does not solve the problem, put
the original part back in the computer. Do not
replace a non-defective FRU.
This index can also be used to help you decide the next
possible FRUs to be replaced when servicing a computer.
Numeric error codes show the errors detected in POST or
system operation (runtime). In the following error codes, X
can be any number. If no codes are available, use narra-
tive symptoms.
If the symptom is not listed, go to “Undetermined
Problems” on page 47.
Note: For IBM devices not supported by diagnostic codes
in this ThinkPad computer, see the manual for that
device.
ThinkPad 390E
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