Output audio from laptop now fails, but only on one output device.

Sep 29, 2018
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Been having an issue with my laptop HDMI output to external playback. Audio and video used to work perfectly on both my projector and my standard TV, but lately only video comes through on my projector. I've tried the standard fixes: fiddling with playback device settings shows sound column rising and falling with playback, but no actual audio heard. I've tried uninstalling and reinstalling and updating drivers. Nothing has worked. Please help! Windows 8.1, MSI laptop. Output to receiver which then pipes audio to surround sound through powered sub, and pipes video to projector.
 

rgd1101

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Question from bruddarastamasta : "Output audio from laptop now fails, but only on one output device."