![background image](http://html.mh-extra.com/html/ibm/thinkpad-a20m/thinkpad-a20m_user-manual_607454033.webp)
Hardware troubleshooting
Message
Cause and action
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 your built-in keyboard operates
correctly. If it does, have the external keyboard serviced.
Make sure that the right connector is being used between the external
keyboard and the computer.
Test the computer by using PC-Doctor (refer to “Testing your computer”
on page 30).
If the computer stops during the test, have it serviced.
0220: Monitor type error
The monitor type does not match the type specified in CMOS. Run the
IBM BIOS Setup Utility (refer to “Starting BIOS Setup Utility” on page 7) 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
(refer to “Testing your computer” on page 30). 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
(refer to “Testing your computer” on page 30). 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
(refer to “Testing your computer” on page 30). If you added 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 the BIOS Setup
Utility (refer to “Starting BIOS Setup Utility” on page 7) 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.
Run the BIOS Setup Utility (refer to “Starting BIOS Setup Utility” on
page 7) to reconfigure the settings. If the same error code appears, have
the computer serviced.
0252: Password
checksum bad
The password you have set is cleared. Run the BIOS Setup Utility (refer
to “Starting BIOS Setup Utility” on page 7) to set the password.
0260: System timer error
Have the computer serviced.
Chapter 3. Solving computer problems
17
Summary of Contents for THINKPAD A20M
Page 1: ......
Page 10: ...x IBM ThinkPad A20 User s Reference ...