VIZIO Support | Checking Your Firmware
About this video
Quick & easy steps to make sure your TV's firmware is up-to-date so you can take advantage of all the latest apps and features SmartCast has to offer.
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Related article summary
Vizio TVs often lose audio due to bad cables, software glitches, or device/channel issues. Fixes include disconnecting and reconnecting all cables, checking and adjusting sound settings (turn off Smart Sound, set Digital Sound Out to PCM, disable AV Sync, choose Optical), switching HDMI ports, using a premium HDMI 2.1/Ultra High Speed cable, power cycling (soft reset) or factory resetting the TV, updating TV firmware (including manual USB method), and updating AVR software. Many users resolve problems by reseating connections or changing sound output settings.