Lenovo ThinkPad L420 User Manual page 178

Error Beep symptom
code
none
0191
0200 Two short beeps
0210 Two short beeps
0211 Two short beeps
0212 Two short beeps
0213 Two short beeps
0220 Two short beeps
0230 Two short beeps
0231 Two short beeps
0232 Two short beeps
0250 Two short beeps
0251 Two short beeps
160
User Guide
Error message
Operating system not found.
0200: Failure Fixed Disk
0210: Stuck Key
0211: Keyboard error
0212: Keyboard Controller Failed
0213: Keyboard locked – Unlock
key switch
0220: Monitor type does not
match CMOS – Run SETUP.
0230: System RAM Failed at
offset:
0231: Shadow Ram Failed at
offset:
0232: Extended RAM Failed at
address line:
0250: System battery is dead -
Replace and run SETUP
0251: System CMOS checksum
bad - Default configuration used
Solution
Make sure that:
• The hard disk drive is correctly
installed.
• A startable disc is in the drive.
If you still see the same error
message, check the boot
sequence using BIOS Setup
Utility.
The hard disk drive is not working.
Have the hard disk drive serviced.
Replace the keyboard and restart
your computer.
Run the interactive tests of the
keyboard and the auxiliary input
device.
Replace keyboard controller.
Unlock the system to proceed.
Load Setup default settings in
BIOS Setup Utility.
System board.
Memory is not working correctly.
Have the memory serviced.
If you still see the same error
message, have the computer
serviced.
Memory is not working correctly.
Have the memory serviced.
If you still see the same error
message, have the computer
serviced.
1. Charge the backup battery
for more than 8 hours by
connecting the ac power
adapter.
2. Replace the backup battery
and run BIOS Setup Utility to
reset the time and date
The system CMOS might have
been corrupted by an application
program. The computer uses the
default settings. Run BIOS Setup
Utility to reconfigure the settings.
If you still see the same error code,
have the computer serviced.