1.Before creating special CONFIG.SYS and AUTOEXEC.BAT files, make a backup copy of these files in a convenient directory. From a DOS prompt, do the following:

a.Type copy CONFIG.SYS CONFIG.IBM and press Enter.

b.Type copy AUTOEXEC.BAT AUTOEXEC.IBM and press Enter.

2.Insert a blank, formatted diskette into the diskette drive.

3.Copy the CONFIG.SYS and AUTOEXEC.BAT files onto the diskette.

4.Turn off the computer and ensure that the system diskette that you created is in the diskette drive.

5.Restart the computer (the computer starts up from the system diskette).

6.Observe the startup messages and ensure the device driver IBMIDECD.SYS loads. When MSCDEX loads, observe the drive letter that the computer assigns to the DVD-ROM drive.

7.Load a data disc into the loading tray; then wait until the Busy indicator is not lit.

8.Attempt to read the disc by typing dir x:, where x is the DVD-ROM drive assigned after the MSCDEX message.

– If the computer is able to read the disc, a conflict probably exists among the device drivers that are loaded by the CONFIG.SYS or AUTOXEC.BAT file. You need to resolve this device conflict. Refer to the documentation that comes with your computer for more information on resolving device conflicts.

– If you are unable to access the disc, you might have a hardware problem. If you are unable to read the disc or a drive letter is not assigned by MSCDEX, go to the next step.

9.Turn off the computer, unplug the cables from the electrical outlets for your computer and all attached devices, and remove the computer cover.

10.Disconnect the IDE and power cables for all IDE devices except the DVD-ROM drive.

11.Configure the DVD-ROM drive as a master and connect it to the last IDE connector on the primary IDE port.

12.Reinstall the computer cover. Reconnect the keyboard; plug the power cords into electrical outlets.

13.Insert the system diskette in the diskette drive and a data disc in the DVD-ROM drive.

14.Restart the computer.

15.Attempt to read the disc by typing dir C: (the DVD-ROM drive is

drive C: because it is the only device that is connected to the IDE port.)

– If the computer is able to read the disc, a conflict probably exists with one of the devices that are installed on your computer. You

Appendix B. Problem solving

B-3

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IBM 10K3799 manual Appendix B. Problem solving