Hi,
Most of the TV sets have " Picture Mute" feature which means; if no signal exists on either Antenna plug or on Video input (RCA jack) no picture at all.Blank screen..no audio as well..all MUTED..
to test it ,play a DVD ,you must have pictures and audio together..
Use an antenna ( even a piece of plain cable will work ) ,and run "search" ,you must receive some TV channels thru AIR.
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