Disk errors
Ted,
Presuming you're using good disks, and you don't get the same
errors if you try the disk in another Amiga, there's one of two things
probably wrong.
1. Dirty drive heads. Places like Radio Shack sell 3.5" drive
cleaning kits…try one.
2. A bad 8520 CIA chip in your Amiga. But usually other problems
will crop up if one of those goes bad.
Don