Troubleshooting
021x: Keyboard error
Make sure that no object is placed on the keyboard or on the external
keyboard, if you have one. 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:
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 PC-Doctor.
If the computer stops during the test, have the computer serviced.
0220: Monitor type error
The monitor type does not match the type specified in CMOS. Run the
IBM BIOS Setup Utility to make sure that your monitor type matches
the type specified in the utility.
0230: Shadow RAM error
The shadow RAM failed. Test your computer's memory with the PC
Doctor. If you added a memory module just before turning the computer
on, reinstall it. Then test the memory with PC-Doctor.
0231: System RAM error
The system RAM failed. Test your computer's memory with the PC
Doctor. If you added a memory module just before turning the computer
on, reinstall it. Then test the memory with PC-Doctor.
0232: Extended RAM error
The extended RAM failed. Test your computer's memory with
PC-Doctor. If you have increased memory just before turning the com-
puter on, reinstall it. Then test the memory with PC-Doctor.
0250: System battery error
The system battery is dead. Replace the battery and run the BIOS
Setup Utility to verify the configuration. If you still have a problem, have
the computer serviced.
0251: System CMOS checksum bad
The system CMOS might have been corrupted by an application
program. The computer uses the default settings. Run the BIOS Setup
Utility (refer to “Starting the BIOS Setup Utility” on page 20)to recon-
figure the settings. If you still see the same error code, have the com-
puter serviced.
0252: Password checksum bad
The password you have set is cleared. Run the BIOS Setup Utility to
set the password.
0260: System timer error
Have the computer serviced.
0270: Real time clock error
Have the computer serviced.
Chapter 5. Solving Computer Problems
31
Summary of Contents for ThinkPad X20
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