IBM ThinkPad T23 2647 Supplementary Manual page 20

Solving computer problems
Message
01C9: More than one
Ethernet devices are
found. Remove one of
them. Press Esc to
continue.
0200: Hard disk error
021x: Keyboard error
0230: Shadow RAM error The shadow RAM failed. Test your computer's memory with PC-Doctor. If
0231: System RAM error
0232: Extended RAM
error
0250: System battery
error
0251: System CMOS
checksum bad
0260: System timer error
0270: Real time clock
error
12
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ThinkPad T23 Service and Troubleshooting Guide
Solution
Remove either an Ethernet Mini-PCI Card or an Ethernet Daughter Card.
Otherwise, press Esc to ignore the warning message. If it does not solve this
problem, have the computer serviced.
The hard disk is not working. Make sure that the hard disk drive is attached
firmly. Run the BIOS Setup Utility; then make sure the hard disk drive is
not disabled in the Startup menu.
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 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, using PC-Doctor.
v If the computer stops during the test, have the computer serviced.
you added a memory module just before turning the computer on, reinstall
it. Then test the memory with PC-Doctor.
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.
The extended RAM failed. Test your computer's memory with PC-Doctor. If
you have increased memory just before turning the computer on, reinstall it.
Then test the memory with PC-Doctor.
The system battery is depleted. This battery is used to preserve the
configuration information, such as the date and time, while the computer is
turned off. Replace the battery and run IBM 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 IBM BIOS Setup Utility to
reconfigure the settings. If you still see the same error code, have the
computer serviced.
Have the computer serviced.
Have the computer serviced.