Solving playback issues

Help with audio & video playback issues, TV display type recognition & compatibility, HDCP messages, troubleshooting playback errors, advertisements, and resolving power issues.
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Level 7

TCL tv And Polk Soundboard only goes up and down by 3s

I have a TCL TV with a polk soundboard and an humidity arc cable.  When I press the up or down on the sound it only changes by 3 levels.  Any ideas on h or to get it to change by 1?

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