Moved house several times? I suspect you have an INDOOR antenna and not an OUTDOOR antenna. Just how many miles are you away from the transmitters?
30? 40? 50? Do you know when you must switch from an INDOOR to an OUTDOOR antenna? I think you might be in the outdoor region, because software does not FIX reception problems, they fix audio / video / operational control issues.
So the question I am wondering about is....Is your TV locking UP? Or is the Picture Freezing? There is a difference. One gets fixed by software/hardware and the other gets fixed with a proper aerial.
If you have any questions, just ask.
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Could be the main board, but the antenna is VERY important on any TV set.
We'll need the full blown model number located on the tag on the right edge of the TV set, and right now LG's new website is still having access issues..