IBM 390E manual Symptom-to-FRU Index

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 39