Symptom/Error FRU/Action
6XX 1. Before changing any
devices, run the
diagnostic test. (See
the “How To Run the
Diagnostics” on
page 405.)
2. FDD external
attachment kit
3. Diskette drive
assembly
4. Riser card
11XX, 12XX 1. Serial devices
2. Communication cable
3. Riser card
17XX 1. Hard disk drive
(2.5-inch ThinkPad
hard disk drive)
2. HDD installation kit
3. Main card
24XX 1. Main card
2. Riser card
860X 1. Mouse
2. External keyboard
3. Riser card
I9990301, I9990302
I9990305
See the Hardware
Maintenance Manual of
the computer.
Not shown above 1. See the
Hardware
Maintenance Manual
of the computer.
2. See “Undetermined
Problems” on
page 421.
FRU Codes
If an error is detected by the diagnostic tests, a four-digit
FRU code is displayed. Two suspected FRU codes are
shown. The two leftmost digits indicate the first FRU code.
The following table shows the FRU codes and their FRUs.
The most probable failing FRU is shown first.
Note: Replace the FRUs one at a time in the sequence
shown in the FRUs of the Dock II column. If a
replaced part did not resolve the problem, put the
original part back in the Dock II. Do not replace
non-defective parts.
Always start with the first FRU then continue down the list.
The two rightmost digits indicate the net FRU code. Do
these FRU replacements in the same way as with the first
FRU codes.
Undock the computer from the Dock II to check that the
FRU code appears with the computer only. If a FRU code
appears, replace the FRU indicated in the
Dock II (3546)
419
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