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Hello, Is there any sort of converter/tuner box connected between the HDTV antenna (I'm assuming that is what you use?) and the TV itself?
If the connection is direct "wall to TV"- with no external box, then this does indicate the TV's built in tuner is failing/has failed. I just want to make sure as we don't always get all of the pieces to the puzzle in the first posting.
Also please confirm if the digits: "FHDTV10A" are after the GV47L and we can proceed.
If you need some assistance here let me know.
If you want to repair the set the part at the link below needs to be purchased and installed in the TV. The software on your mainboard is failing and is causing the issue with the tuner dropping out like this. There aren't any settings or adjustments that will fix this. Here is the Mainboard:
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