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0200
Fixed disk failure
1. Reseat the hard disk
drive.
2. Load Setup Defaults in IBM
BIOS Setup Utility.
3. Hard disk drive.
4. System board.
021x
Monitor type does not match
CMOS
1. Load Setup Defaults in
IBM BIOS Setup Utility.
0220
Shadow RAM failure at offset
nnnn
1. System board.
0232
Extended RAM failure at offset
nnnn
1. DIMM.
2. System board.
0250
System battery is dead—
replace and run setup
1. Replace the backup
battery and run IBM BIOS
Setup Utility to reset the
time and date.
0251
System CMOS checksum
bad—Default configuration used
1. Replace the backup
battery and run IBM BIOS
Setup Utility to reset the
time and date..
0252
Password checksum bad.
1. Reset the password by
running IBM BIOS Setup
Utility.
0260
System timer error
1. Replace the backup
battery and run IBM BIOS
Setup Utility to reset the
time and date.
2. System board.
0270
Real time clock error
1. Replace the backup
battery and run IBM BIOS
Setup Utility to reset the
time and date.
2. System board.
0271
Date and time error
1. Run IBM BIOS Setup
Utility to reset the time
and date..
0280
Boot incomplete error— Default
configuration used
1. Load Setup Defaults in
IBM BIOS Setup Utility.
2. DIMM.
3. System board.
Chapter 3. ThinkPad X20, X21, X22, X23, X24 49