If the tests run successfully, an expansion card may be conflicting with the diskette drive logic, or an expansion card may be faulty. Continue to the next

step.

If the tests fail, see

"Getting

16. Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.

17. Open the system. See

"Opening the

18. Reinstall one of the expansion cards you removed in

19. Close the system. See

"Closing the

20. Reconnect the system to the electrical outlet, and turn on the system and attached peripherals.

21. Run the appropriate online diagnostic test to see whether the diskette drive works correctly.

22. Repeat

step 16

through

step 21

If the problem is not resolved, see

Troubleshooting an Optical Drive

Problem

System cannot read data from a CD.

Optical drive indicator does not blink during boot.

Action

CAUTION:

See your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting

against electrostatic discharge.

1. Try using a different CD that you know works properly.

2. Enter the System Setup program and ensure that the drive's IDE controller is enabled. See "Using the System Setup Program" in your User's Guide.

3. Run the appropriate online diagnostic test. See

4. Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.

5. Ensure that the optical drive interface cable is securely connected to the drive and the system board. To identify the connector on the system board, see

Figure A-3.

6. Ensure that a power cable is securely connected to the drive.

7. Reconnect the system to the electrical outlet, and turn on the system and attached peripherals.

If the problem is not resolved, see

Troubleshooting a SCSI Tape Drive

Problem

Defective tape drive.

Defective tape cartridge.

Help."

System."

step

12. See