Technical information

Symptom or error FRU or action, in sequence
0250
System
battery error—System
battery is dead.
Replace the backup battery
and run IBM BIOS Setup
Utility to reset the time and
date.
0251
System
CMOS checksum
bad—Default configuration
used.
Replace the backup battery
and run IBM BIOS Setup
Utility to reset the time and
date.
0252
Password
checksum bad—The
password is cleared.
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—Neither
the date nor the time is set in
the computer.
Run IBM BIOS Setup Utility to
reset the time and date.
0280
Previous
boot
incomplete—Default
configuration used.
1. Load “Setup Default” in
IBM BIOS Setup Utility.
2. DIMM.
3. System board.
02B2
Incorrect
drive A type
1. Diskette drive.
2. External FDD cable.
3. I/O card.
02F4
EISA
CMOS not writable
1. Load Setup Defaults in
IBM BIOS Setup Utility.
2. Replace the backup battery.
3. System board.
02F5
DMA
test failed
1. DIMM.
2. System board.
02F6
Software
NMI failed
1. DIMM.
2. System board.
02F7
Fail-safe
timer NMI failed
1. DIMM.
2. System board.
1801
Attached
docking station is not
supported
Shut down the computer and
remove it from the docking
station.
1802
Unauthorized
network card is
plugged in—Power off and
remove the miniPCI network
card.
1. Remove Mini PCI network
card.
2. System board.
Symptom-to-FRU index
ThinkPad R40 55