Internal Speaker Failure; Sound Problems - Acer Aspire 4739Z Service Manual

Internal Speaker Failure

If internal Speakers fail, perform the following:

Sound Problems

Perform the following, one at a time.
1.
Boot the computer.
2. Navigate to Start
Device Manager. Check the Device Manager to determine that:
3. If updated recently, roll back the audio driver to the previous version.
4. Remove and reinstall the audio driver.
5. Make sure that all volume controls are set mid range:
6. Navigate to Start
Troubleshooting
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Figure 4-6. Internal Speaker Failure
Control Panel
The device is properly installed
There are no red Xs or yellow exclamation marks
There are no device conflicts
No hardware is listed under Other Devices
Click the volume icon on the taskbar
Drag the slider to 50. Confirm that the volume is not muted.
Click Mixer to verify that other audio applications are set to 50 and not muted.
Control Panel
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System
Sound. Confirm that
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