Acer TravelMate P453-M Acer TravelMate P453, P453-M, P453-MG Notebook Service - Page 189
Reinstall the Operating System., Start, Control Panel, Hardware and Sound, Sound
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Click Mixer to verify that other audio applications are set to 50 and not muted. 6. Navigate to Start Control Panel Hardware and Sound Sound. Confirm that Speakers are selected as the default audio device (green check mark). NOTE: NOTE: If Speakers do not show, right-click on the Playback tab and select Show Disabled Devices (clear by default). 7. Select Speakers and click Configure to start Speaker Setup. Follow the on-screen prompts to configure the speakers. 8. Remove any recently installed hardware or software. 9. Restore system and file settings from a known good date using System Restore. 10. If the issue is remains, repeat step 9, selecting an earlier time and date. 11. Reinstall the Operating System. 12. Connect a set of earphones or external speakers. If these function correctly, the internal speaker or I/O board may be defective. If they do not function correctly, the mother board may be defective or damaged. 13. If the Issue is still not resolved, refer to Online Support Information. Troubleshooting 4-11