Seemingly, tomlee59 and I were beavering away with answers at the same time. What he has written I concur with, but your amplification narrows the problem somewhat. 0F in the first line under the Sad Mac indicates that there is a software error (a '68K exception'). The codes are not precise enough to say where the error lies, but there is every chance that it may be solved by re-installing the System, or a newer System. Do you have Install diskettes for the Classic II? System 7.5 would do very nicely, especially if there is not the full (and maximun) 10MB of RAM that the Classic II can use. The Install disks will also have Disk First Aid, with which you can verify the data structures of the HDD, and a disk utility with which to reinstall Apple's hard disk driver software.
What software is at your disposal?

de

Click to expand...

bad F-Line instruction