Question Westinghouse TV has intermittent black square

Michael_707

Commendable
Jul 2, 2017
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My friend has a Westinghouse WD32HB1120-C and recently he has been complaining of a black square that pops up intermittently.

The Comcast Box (does not have HDTV) is driving his TV over a coax cable.

I have never heard of a black square problem?

I have heard of black bars that happen due to loose ribbon cables internal to the set?

I was wondering if a loose internal connection could be the cause?
 
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