Lenovo 3493DFU, 3496 manual CD problems, Sound comes from one external speaker only

Note: When external-speaker or headphone cables are attached to the audio connector, the internal speaker, if present, is disabled. In most cases, if an audio adapter is installed in one of the expansion slots, the audio function built into the system board is disabled; use the audio jacks on the adapter.

•Make sure that the program you are running is designed for use in the Microsoft Windows operating system. If the program is designed to run in DOS, the program does not use the Windows sound feature and must be configured to use SoundBlaster Pro or SoundBlaster emulation.

•Verify that the audio device drivers are correctly installed. See Microsoft Windows help system for more information.

If these actions do not correct the problem, run the diagnostic programs (see “Diagnostic programs” on page 108 for instructions). If you need technical assistance, see Chapter 11 “Getting information, help, and service” on page 111.

An audio disc or AutoPlay-enabled disc does not automatically play when it is inserted into a drive

Symptom: An audio disc or AutoPlay-enabled disc does not automatically play when it is inserted into a drive

Action: See “CD problems” on page 94.

Sound comes from one external speaker only

Symptom: Sound comes from one external speaker only.

Actions:

•Ensure that the speaker cable is inserted completely into the connector on the computer.

•Make sure the cable that attaches the left speaker to the right speaker is securely connected.

•Double-click the speaker icon in the Windows notification area. A master volume-control window opens. Verify that the Balance settings are set correctly.

If these actions do not correct the problem, you might have a failing speaker. Have the speaker serviced. If you need technical assistance, see Chapter 11 “Getting information, help, and service” on page 111.

No audio in DOS applications or games

Symptom: No audio in DOS applications or games

Actions:

•Make sure the DOS application or game is configured to use SoundBlaster Pro or SoundBlaster emulation. Refer to the documentation that comes with the application or game for instructions on setting sound-card settings.

•If these actions do not correct the problem, run the diagnostic programs (see “Diagnostic programs” on page 108 for instructions). If you need technical assistance, see Chapter 11 “Getting information, help, and service” on page 111.

CD problems

Select your symptom from the following list:

•“An audio disc or AutoPlay-enabled disc does not automatically play when it is inserted into a CD drive” on page 95

•“A CD or DVD does not work” on page 95

•“Unable to use a startable (bootable) recovery medium, such as the Product Recovery CD, to start your computer” on page 95

94ThinkCentre User Guide