Hi,

Welcome to Dell Community Forum.

If this is a recent occurrence and the internal mic was working fine earlier, I would recommend that you do a System Restore and take the system back to a date when it was working fine.

For steps to perform System Restore, click on the link below:

 http://dell.to/JEe9aR

Please note: Any application recently installed on the computer would be erased however, the files and folders already saved on the computer would be intact.

Sometimes, an issue like this may also occur due to updates not being installed properly on the system and if System Restore does not help, please update the Audio drivers for your computer by clicking on the link below.

http://dell.to/uIo3ef

Enter the Service Tag, select the Operating System you are using and then download and install the latest Audio driver.

Also, run Windows Audio Playback Diagnose and Repair through MS FIX-IT accessible through the link below.

 http://bit.ly/JvQScV

Please reply if you have any further questions.

Thanks and regards,
Babita S
#iworkforDell 

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