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Dell XPS 13 7390 Microphone Not Detecting Sound

Introduction

If your Dell XPS 13 7290’s built-in microphone is not picking up sound as an input, you may have a software problem, try the following steps to resolve your issue.

Causes

Microphone Muted or Disabled in Windows Settings

Ensure Microphone is not muted and enabled in Windows settings and app permissions.
Select the correct sound device if not currently selected.
Check your microphone privacy by going to Start > Settings > Privacy & security > Microphone. Make sure "Let apps access your microphone" is On, and enable access for individual apps you want to use with it.
Ensure your microphone is selected as the recording device.
Make sure your microphone is Enabled in device manager. Right-click the Start button, select Device Manager, expand Audio inputs and outputs, right-click your microphone, and select Enable Device if it's disabled.

Software Conflict or System Recognition Error

Go to Settings > System > Sound. Click “Troubleshoot” under “Input” to detect and fix common microphone issues. You may need to restart your computer after this step.

Outdated or Corrupted Audio Driver

Install “Dell Command Update” to automatically install recommended drivers.
If that doesn't work, you can manually install the ++Realtek Audio Driver++ from Dell's support site. You may need to restart your computer after this step.

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