Acer Aspire V3-771G Acer Aspire V3-771G Notebook Service Guide - Page 226

Internal & External Speaker Failure 0 If internal Speakers fail, perform the following, one at a time. Do not replace a non-defective FRU: START START Check MB SPK cable NG Reassemble the SPK cable to MB Check I/O Board Connection NG Reassemble I/O Board FPC Check SPK module NG Swap Reassemble The SPK module Check I/O Board OK? NG Swap I/O Board Swap MB Swap MB Figure 4-6. Internal Speaker Failure Sound Problems 0 Perform the following, one at a time. 1. Boot the computer. 2. Navigate to Start Control Panel System and Security System Device Manager. Check the Device Manager to determine that: The device is properly installed There are no red X or yellow exclamation marks There are no device conflicts No hardware is listed under Other Devices 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: Click the volume icon on the task bar Drag the slider to 50. Confirm that the volume is not muted. 4-10 Troubleshooting