Epson 4000 - Manual (Page 109)

Reinserting the diskette does not solve the problem.
Insert the diskette in another diskette drive of the same type. If
you can read the diskette in a different drive, your drive may
be faulty.
The diskette is the right type, but you still see an error.
Check that the diskette is not write-protected, preventing the
drive from writing to the diskette.
Make sure the diskette is formatted. See your operating system
documentation for instructions on formatting diskettes.
You may have a defective diskette. Try copying the files from
the bad diskette to a new diskette.
Something is wrong with the
data
in the files.
If you are using MS-DOS, run CHKDSK to repair the files. You
may also be able to use special utilities or diagnostics to solve
this problem.
Diskette Drive Problems
A newly-installed diskette drive is not working properly.
Make sure you have installed the drive correctly and check all
the cable connections.
You see a diskette drive error when you
start
your computer.
Run the SETUP program and configure your system for the
correct type of diskette drive.
The diskette drive is
making
loud or unusual noises.
Contact your service representative.
Troubleshooting 7-7