Ensure that the disc surface is clean and not scratched.

Check all cable connections to and from the speakers.

Use the DVD menu for the video to select a different audio track.

If these actions do not correct the problem, run the Lenovo Solution Center program. If you need technical assistance, see “Lenovo Support Web site” on page 31.

Playback is very slow or choppy

Symptom: Playback is very slow or choppy.

Actions:

Disable any background programs, such as AntiVirus or Desktop Themes.

Ensure that video resolution is set to less than 1152 x 864.

If these actions do not correct the problem, run the Lenovo Solution Center program. If you need technical assistance, see “Lenovo Support Web site” on page 31.

Invalid disc or no disc found message

Symptom: Invalid disc or no disc found message

Actions:

Ensure that a DVD disc is in the drive with the shiny side of the disc facing down.

Ensure that video resolution is set to less than 1152 x 864.

On computers that have a CD-ROM or CD-RW drive in addition to a DVD-ROM drive, ensure that the DVD disc is in the drive labeled “DVD”.

If these actions do not correct the problem, run the Lenovo Solution Center program. If you need technical assistance, see “Lenovo Support Web site” on page 31.

Intermittent problems

Symptom: A problem occurs only occasionally and is difficult to repeat.

Actions:

Verify that all cables and cords are securely connected to the computer and attached devices.

Verify that when the computer is on, the fan grill is not blocked (there is air flow around the grill), and the fans are working. If airflow is blocked or the fans are not working, the computer might overheat.

If SCSI devices are installed, verify that the last external device in each SCSI chain is terminated correctly. (See your SCSI documentation.)

If these actions do not correct the problem, run the Lenovo Solution Center program. If you need technical assistance, see “Lenovo Support Web site” on page 31.

Hard disk drive problems

Select your symptom from the following list:

“Some or all hard disk drives missing from the Setup Utility program” on page 42

““No Operating System Found” message or the system not starting from the correct hard disk drive” on page 42

Chapter 5. Troubleshooting and diagnostics 41

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Lenovo 10BL, E73Z manual Intermittent problems, Hard disk drive problems, Playback is very slow or choppy