I had an installer bring out an HD antenna and when he installed it I was getting no signal from the antenna, we tried everything to fix it (puting it up higher, rotating, moving to a different location, we even tried a different antenna, but nothing) to make a long story short the installer came back four times and never got it to work, does anyone have any suggestions, when i try to view my locals in hd on my H20 it just says searching for signal....is there anything else i can try? I know my area is close enough to recieve the channels because there are people that live further than me that use the HD antenna and it works for them...