IBM ThinkPad X20 Supplementary Manual page 23

Message
0271: Date and time error Neither the date nor the time is set in the computer. Set the date and time,
0280: Previous boot
incomplete
02D0: System cache error The cache is disabled. Have the computer serviced.
02F4: EISA CMOS not
writable
02F5: DMA test failed
02F6: Software NMI
failed
02F7: Fail-safe timer NMI
failed
The power-on password
prompt
The hard disk password
prompt
Hibernation error
Operating system not
found.
Fan error
Solution
using the IBM BIOS Setup Utility.
Your computer was previously unable to complete the boot process.
Turn the computer off; then turn it on to start the IBM BIOS Setup Utility.
Verify the configuration and then restart the computer either by choosing
the Exit Saving Changes option under the Restart item or by pressing F10.
If you still see the same error code, have the computer serviced.
Have the computer serviced.
Have the computer serviced.
Have the computer serviced.
Have the computer serviced.
A power-on password or a supervisor password is set. Type the password
and press Enter to use the computer. If the power-on password is not
accepted, a supervisor password might have been set. Type the supervisor
password and press Enter. If you still see the same error message, have the
computer serviced.
A hard disk password is set. Type the password and press Enter to use the
computer.
If you still see the same error message, have the computer serviced.
The system configuration changed between the time your computer entered
hibernation mode and the time it left this mode, and your computer cannot
resume normal operation.
v Restore the system configuration to what it was before your computer
entered hibernation mode.
v If the memory size has been changed, re-create the hibernation file.
Verify the following:
v The hard disk drive is correctly installed.
v A startable diskette is in the diskette drive
If the same error message is still displayed, check the boot sequence, using
the IBM BIOS Setup Utility.
The cooling fan has failed. Have the computer serviced.
Solving computer problems
Chapter 2. Solving computer problems
13