There are only two possibilities for this problems for this tv.One: the tv incomming broadcasting signal cable wire that is plugging into ur tv Tuner signal board could be bad.U can test this out the incomming broadcasting signal cable wire is good or bad pretty easily by just plug it into another tv to find out the incomming signal cable wire is bad or good.Two: If the tv incomming broadcasting signal cable wire is good by plug it into a another tv.Than ur tv the tv Tuner signal board is the causes and the problems.The tv Tuner signal board CPU chip is bad.U can do some mechanical work like take things aparts and putting it back together again?Yes.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish tv Tuner signal board for the replacement.
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