Lenovo ThinkPad A22p Service and Troubleshooting Guide for A22m and A22p - Page 24
Solving computer problems, Message, Solution - cmos battery
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Solving computer problems Message 021x: Keyboard error Solution 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: 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 was, have the external keyboard serviced. v Make sure that the external keyboard is connected to the correct connector. Test the computer, using PC-Doctor. v 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 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 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 increased memory just before turning the computer on, reinstall it. Then test the memory with PC-Doctor. 0250: System battery error The system battery is dead. Replace the battery and run IBM 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 IBM BIOS Setup Utility to reconfigure the settings. If you still see the same error code, have the computer serviced. 0260: System timer error Have the computer serviced. 0270: Real time clock error Have the computer serviced. 0271: Date and time error Neither the date nor the time is set in the computer. Set the date and time, using the IBM BIOS Setup Utility. 02D0: System cache error The cache is disabled. Have the computer serviced. 02F4: EISA CMOS not writable Have the computer serviced. 14 ThinkPad® A22 Service and Troubleshooting Guide