Type C : and press Enter to log onto the hard disk. If this works, the next step is to make sure the COMMAND.COM file is in the root directory of the hard disk. Type DIR and press Enter.

If COMMAND.COM is in the root directory, use the MS-DOS COMPARE command to compare the COMMAND.COM file on your diskette with the COMMAND.COM file on the hard disk. (See your MS-DOS Reference Manual for instructions on using COMPARE.) If the files do not match, use the COPY command to replace the file on the hard disk with the file on your diskette. Type the following and press Enter:

COPY A:COMMAND.COM C:

Remove the Startup diskette and press the RESET button to reset the computer. If the computer loads MS-DOS from the hard disk, you may have corrected the problem.

4.If the hard disk still does not work, the root directory of your hard disk may be missing some hidden system files. (Hidden files are not listed when you use the DIR command.)

Insert the Startup diskette and type A : to log onto drive A. Then type the following and press Enter to copy the hidden system files from your Startup diskette to the root directory of the hard disk:

SYS c:

Remove the Startup diskette and reset the computer to see if it loads MS-DOS from the hard disk.

5.If you can load MS-DOS from your Startup diskette but you cannot access data stored on your hard disk, you may have accidentally repartitioned or reformatted part or all of the disk.

D-20 Troubleshooting