Lenovo ThinkPad T400 Service And Troubleshooting Manual page 26

Message
01C9: More than one
Ethernet devices are
found. Remove one
of them. Press <Esc>
to continue.
0200: Hard disk
error
021x: Keyboard error Make sure that there are no objects placed on the keyboard, or
0230: Shadow RAM
error
0231: System RAM
error
0232: Extended RAM
error
0250: System battery
error
16
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ThinkPad T400 and R400 Service and Troubleshooting Guide
Solution
Your ThinkPad computer has a built-in Ethernet feature, and
you cannot add another such feature by installing an Ethernet
device such as a Mini-PCI Ethernet Card or an Ethernet
Daughter Card. If this error message is displayed, remove the
Ethernet device that you installed. Otherwise press Esc to
ignore the warning message. If this does not solve the problem,
have the computer serviced.
The HDD or SSD is not working. Make sure that the HDD or
SSD is attached firmly. Run the BIOS Setup Utility; then make
sure the drive is not disabled in the Startup menu.
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 by using PC-Doctor.
v If the computer stops during the test, have the computer
serviced.
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.
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 backup battery, which is used to preserve the
configuration information, such as the date and time, while the
computer is turned off, is depleted. Replace the battery and
run the BIOS Setup Utility to verify the configuration. If you
still have a problem, have the computer serviced.