Lenovo ThinkPad G40 Series Service And Troubleshooting Manual page 37

Message
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
1802: Unauthorized
network card is plugged
in - Power off and
remove the miniPCI
network card.
1803: Unauthorized
daughter card is plugged
in - Power off and
remove the daughter
card.
1804: Unauthorized
battery is detected-
Replace it with a battery
of the correct model.
Solution
Your computer was previously unable to complete the boot process.
Turn the computer off; then turn it on to start the 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.
The Mini-PCI network card is not supported on this computer. Remove it.
The daughter card is not supported on this computer. Remove it.
You cannot use the attached battery with this computer. Replace it with a
battery of the correct model.
Solving computer problems
Chapter 2. Solving computer problems
15