If you are using DVR/cable box, then shutdown the TV and DVR/cable box . unplug the Cable box from AC power for minutes. During this time, disconnect and reconnect the HDMI cable on both ends, making sure it is secure. Then plug the cable box back in, turn on and let it reboot. Once it's rebooted, then turn on the TV and attempt to watch a program.
The sound should be back on at this point. If the problem exist please follow this.
1- Power off TV
2- Unplug TV from outlet
3- Press and hold in the power button on the TV for 30 seconds (while it is unplugged from the wall)
4- Release the power button
5- Plug in the TV into a different outlet
6- Power the TV back on.
Reset the TV settings.
Hope it will work.
Vizio TV's come with one year warranty. If you have the warranty period left please call VIZIO Toll-Free at(NNN) NNN-NNNN If a problem cannot be taken care of over the phone a technician will be sent to you home.
If the problem exist or any more question please let me know.
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