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Solution: Make sure that there are no objects placed on the keyboard, or if you have one, the external
keyboard. Turn off the computer, and turn off all attached devices. Turn on the computer rst; 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:
– 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 was, have the external keyboard serviced.
– Make sure that the external keyboard is connected to the correct connector.
Test the computer by using Lenovo ThinkVantage Toolbox.
– If the computer stops during the test, have the computer serviced.
• Message: 0230: Shadow RAM error.
Solution: The shadow RAM failed. Test your computer's memory with Lenovo ThinkVantage Toolbox. If
you added a memory module just before turning the computer on, reinstall it. Then test the memory with
Lenovo ThinkVantage Toolbox.
• Message: 0231: System RAM error.
Solution: The system RAM failed. Test your computer's memory with Lenovo ThinkVantage Toolbox. If
you added a memory module just before turning the computer on, reinstall it. Then test the memory with
Lenovo ThinkVantage Toolbox.
• Message: 0232: Extended RAM error.
Solution: The extended RAM failed. Test your computer's memory with Lenovo ThinkVantage Toolbox. If
you have increased memory just before turning the computer on, reinstall it. Then test the memory with
Lenovo ThinkVantage Toolbox.
• Message: 0250: System battery error.
Solution: The backup battery, which is used to preserve the conguration information, such as the date
and time, while the computer is tuned off, is depleted. Replace the battery and run ThinkPad Setup to
verify the conguration. If you still have a problem, have the computer serviced.
• Message: 0251: System CMOS checksum bad.
Solution: The system CMOS might have been corrupted by an application program. The computer uses
the default settings. Run ThinkPad Setup to recongure the settings. If you still see the same error code,
have the computer serviced.
• Message: 0260: System timer error.
Solution: Have the computer serviced.
• Message: 0270: Real time clock error.
Solution: Have the computer serviced.
• Message: 0271: Date and time error.
Solution: Neither the date nor the time is set in the computer. Set the date and time, using the ThinkPad
Setup.
• Message: 0280: Previous boot incomplete.
Solution: Your computer was previously unable to complete the boot process.
134 User Guide