Have TV Questions? Ask a TV Technician
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Please shut your TV off, then unplug the Cable Box/SAT Box, soundbar and TV from power (pull their power cords or shut off the plug strip they are all plugged into). Wait 10 seconds and then begin plugging them all back in. When the cable box starts rebooting (give it about a minute), turn the TV on and the soundbar. Once the box finishes rebooting- check and see if you have sound. Let me know what happens.
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Okay, we need to determine whether the issue is your soundbar- or your cable box. What else is connected to the TV/Soundbar? Do you have a DVD player you can TEST?
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Okay, then it's hard to determine what is the root cause. Did you do a full reboot of the cable box as indicated above? Also is the soundbar st to the correct "Input"?
I'm not asking for the phone call- it's auto-generated by the site. You can ignore it.
By knowing how the soundbar connects to the TV or cable box. The type of cable determines the Input setting. If it's Optical you select Optical, if it's analog cabling you select the AUX Input. Or try them ALL one at a time and see if any give you sound.
I mentioned nothing about checking connections. Re-read what I posted above. The connection type determines the Input. Again- if you are unsure then try each of the Input selections using the Vizio remote.
The Input button on the soundbar is second in from the left (on the bar itself). It switches between optical, analog, Auxiliary and bluetooth. Please try each one of the selections to see if any give you your sound back please.