Dynex 32" Flat screen with green lines and audio problem

I bought thisDynex 32" flat screen in September and it has started to develop problems. It will be on and green lines start forming and go away. Then the sound goes in and out. The green lines come back and the sound works sparsely. I am wondering what is the issue. I have tried unconnected everything; leaving the power off for hours. Somedays it works great or sometimes out of the blue it just craps out but lately I am getting more bad days than good ones. Any help or suggestions would be great. All I got from Dynex was that I had to bring the TV back to BestBuy and have a master technician look at it....

Sounds like it needs servicing.  If you bought it in September it should still be under the 1 yr manufacturer warranty.  You can bring it into the store with your receipt and have customer service send it to service for you.  It will be returned to the store and can be picked up when service is complete.  I will say, however, warranty service can be lengthy.  Expect to not have your TV for a few weeks.
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