Epson LT - 286e - Manual (Page 101)

If you have trouble copying the entire diskette, some of the
sectors may be bad. Try using the COPY command to copy
one file at a time. Then repeat the operation to see if it
works on the copy. If it does, the original diskette is
damaged.
2. Is the diskette write-protected? If the write-protect switch is
set, first make sure the diskette does not contain files you do
not want to change or lose. Then try moving the switch to
remove the write protection. (Ordinarily, it’s a good idea to
leave program diskettes write-protected, but some programs
don’t work properly on write-protected diskettes.)
3. Try formatting a blank diskette to determine if the diskette
drive is operating properly.
If you cannot format a diskette, contact your Epson dealer.
Hard Disk Problems
If you have problems with your hard disk when you first start to
use it, make sure it is properly set up. See the instructions for
setting up the hard disk in your MS-DOS Installation Guide.
If the hard disk still does not work, contact your Epson dealer or
have an authorized Epson Customer Care Center check your
hard disk. Never open the airtight container that encloses the
hard disk.
Troubleshooting 4-5