IBM ThinkPad Z61 Supplementary Manual page 21

Message
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.
1810: Hard disk partition
layout error
Solution
Have the computer serviced.
Have the computer serviced.
Have the computer serviced.
Have the computer serviced.
The PCI Express Mini card is not supported on this computer. Remove it.
The daughter card is not supported on this computer. Remove it.
A problem in recognizing the layout of the partition on the hard disk has
halted computer startup. Either the Predesktop Area has been deleted, or the
hard disk contains corrupt data. To try to restart your computer, complete
one of the following:
v If the Predesktop Area has been deleted
1. Press F1 to open the BIOS Setup Utility.
2. Select Security -> Predesktop Area -> Access Predesktop Area.
3. Set this item to Disabled.
4. Save and exit.
v If the above fails
1. Press Enter.
2. Double-click RECOVER TO FACTORY CONTENTS and follow
on-screen instructions.
Note: This will permanently erase the entire contents of the hard disk,
and then restore software preinstalled by Lenovo.
Press F1 to open BIOS Setup, or Enter to start the Predesktop Area.
If the computer still does not start, call the Customer Support Center.
Telephone numbers are listed in "Worldwide telephone list" on page 60.
Solving computer problems
Chapter 3. Solving computer problems
13