IBM ThinkPad T21 Hardware Maintenance Manual page 57

Symptom or error
0232
Extended RAM
error—Extended RAM fails at
offset nnnn.
0250
System battery error—System
battery is dead.
0251
System CMOS checksum
bad—Default configuration
used.
0252
Password checksum bad—The
password is cleared.
0260
System timer error
0270
Real time clock error
0271
Date and time error—Neither
the date nor the time is set in
the computer.
02B2
Incorrect drive A type
02F4
EISA CMOS not writable
02F5
DMA test failed
02F6
Software NMI failed
02F7
Fail-safe timer NMI failed
ThinkPad T20, T21, T22 and T23 series
Symptom-to-FRU index
FRU or action, in sequence
1. DIMM.
2. System board.
Replace the backup battery
and run IBM BIOS Setup
Utility to reset the time and
date.
Replace the backup battery
and run IBM BIOS Setup
Utility to reset the time and
date.
Reset the password by
running IBM BIOS Setup
Utility.
1. Replace the backup
battery and run IBM BIOS
Setup Utility to reset the
time and date.
2. System board.
1. Replace the backup
battery and run IBM BIOS
Setup Utility to reset the
time and date.
2. System board.
Run IBM BIOS Setup Utility to
reset the time and date.
1. Diskette drive.
2. External FDD cable.
3. I/O card.
1. Load Setup Defaults in
IBM BIOS Setup Utility.
2. Replace the backup battery.
3. System board.
1. DIMM.
2. System board.
1. DIMM.
2. System board.
1. DIMM.
2. System board.
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