Lenovo ThinkPad X60 Tablet 6363 Supplementary Manual page 22

Solving computer problems
Message
021x: Keyboard error Make sure that there are no objects placed on the keyboard, or
0230: Shadow RAM
error
0231: System RAM
error
0232: Extended
RAM error
0250: System battery
error
0251: System CMOS
checksum bad
0271: Date and time
error
0280: Previous boot
incomplete
14
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ThinkPad X60 Tablet Service and Troubleshooting Guide
Solution
if you have one, the external keyboard. Turn off the computer,
and turn off all attached devices. Turn on the computer first;
then turn on the attached devices.
If you still see the same error code, do the following:
If an external keyboard is connected, do the following:
v Turn off the computer and disconnect the external keyboard;
then turn on the computer. Make sure that the built-in
keyboard operates correctly. If it does, have the external
keyboard serviced.
v Make sure that the external keyboard is connected to the
correct connector.
Test the computer by using PC-Doctor.
v If the computer stops during the test, have the computer
serviced.
Test your computer's memory with PC-Doctor. If you added a
memory module just before turning the computer on, reinstall
it. Then test the memory with PC-Doctor.
The backup battery, which is used to preserve the configuration
information, such as the date and time, while the computer is
turned off, is depleted. Replace the battery and run BIOS Setup
Utility to verify the configuration. If you still have a problem,
have the computer serviced.
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.
Neither the date nor the time is set in the computer. Set the
date and time, using the BIOS Setup Utility.
Your computer was previously unable to complete the boot
process.
Turn the computer off; then turn it on to start the BIOS Setup
Utility. Verify the configuration and then restart the computer
either by choosing the Exit Saving Changes option under the
Restart item or by pressing F10. If you still see the same error
code, have the computer serviced.