IBM ThinkPad A20m Hardware Maintenance Manual page 56

Symptom or error
0190
Critical low battery error.
0193
RF antenna has been removed.
0194
The computer has been carried
through a security gate.
0200
Hard disk error — The hard
disk is not working.
021x
Stuck key — Keyboard error.
0220
Monitor type error — Monitor
type does not match the one
specified in CMOS.
0230
Shadow RAM error — The
shadow RAM failure at offset
nnnn.
0231
System RAM error — System
RAM failure at offset nnnn.
0232
Extended RAM error —
Extended RAM failure 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.
(continued)
50
ThinkPad A20m/p, A21m/p, A22m/p
Symptom-to-FRU index
FRU or action, in sequence
1. Charge the battery pack.
2. Battery pack.
Enter the supervisor
password.
Enter the supervisor
password.
1. Reseat the hard-disk
drive.
2. Load Setup Defaults in IBM
BIOS Setup Utility.
3. Hard-disk drive.
4. System board.
Run interactive tests of the
keyboard and the auxiliary
input device.
Load Setup Defaults in IBM
BIOS Setup Utility.
System board.
1. DIMM.
2. System board.
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.