Epson 486SX - Manual (Page 175)

Hard Disk Problems
If you are having a problem with a hard disk in your computer,
you may see a hard disk error message. The problem could be
the result of improper installation, incomplete disk preparation,
or corrupted data. The suggestions in this section cover
problems in three categories:
Installing the drive
Preparing the drive for use
Accessing data on the drive.
Consult the section that seems most likely to include your
problem. For example, if you suddenly cannot use data on your
disk, see “Accessing Data on the Drive.”
Caution
If your hard disk has data on it, be very careful performing
any procedure that may erase data (such as formatting the
disk). Always be sure to back up your data before you
reformat or repartition the disk drive. Consult your dealer if
you have any questions.
Installing the Drive
If you have problems with a newly-installed drive, check the
following:
1. If your dealer installed the drive, consult that person about
the problem.
B-20 Troubleshooting