Sometimes corrupt sound controllers may also cause an issue with HDMI. Note: Always restart your computer after updating the drivers to fix the problem. Select all outdated drivers one by one and click on the ‘Update’ button.Click ‘Start Scan’ after connecting to high-speed internet.Open Intel Driver Update Utility software.If there are no new releases, it will say ‘The best drivers for your device are already installed.’ If this happens, download Intel Driver Update Utility & install it on your computer. This will fix most of the problems related to hdmi sound not showing up. This scans directories on the internet to download & install a newer version of the driver. Follow the on-screen windows instructions by pressing next and next.Select the option ‘search automatically’.
Right-click on ‘Speakers (High Definition Audio)’ & select update.Expand ‘Audio inputs and outputs’ by clicking on the little drop-down arrow.Right-click Start menu & select ‘Device Manager’.This method requires a high-speed network connection to update drivers.
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