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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
did 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 which
FRUs to have available 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
narrative symptoms. If the symptom is not listed, go to
“Undetermined Problems” on page 23.
Note: For any IBM device not supported by the diagnostic
codes in this ThinkPad computer, see the manual for that
device.
Numeric Error Codes and Messages
Error
Code
Message FRU/Action in Sequence
POST
010 Memory Error
at MMMM:
SSSS:
OOOOh
(R:xxxxh,
W:xxxxh)
1. Go to “Memory Checkout”
on page 4.
2. DIMM
3. System board
011 64KB System
Management
Memory Bad
1. Enter BIOS Utility to
execute Load Setup Default
Setting, then reboot system.
2. DIMM
3. System board
015 Battery is
Critical Low
1. Go to “Checking the Battery
Pack” on page 10.
2. Battery
3. Battery connector board
4. Charger board
5. System board
020 Keyboard
Interface
Error
Note: The
message only
appears for a
few seconds.
1. Go to “Keyboard and
External Input Device
Checkout” on page 5.
2. Ensure that the keyboard
switch is correctly set.
3. Reseat the keyboard
flexible cables.
4. Replace the keyboard
connection board.
5. Replace the keyboard
assembly.
6. Replace the system board.
14 IBM Mobile Systems ThinkPad 310 (D/E/ED) HMM