I installed an HD antenna in my attic, and installed an amplifier as well. It worked well for a while, but now seems to cut in and out a lot. Not consistently though. Right now as I write this post no channels are cutting in and out When it does go out, the screen will go blank and I will get a small white box saying "weak signal". My wife keeps saying, "you need to get up there and see if something is loose". I, being the intrinsically lazy person that I am and not wanting to go back in the attic, keep thinking that this could not be it - that if something is loose it simply is not going to get any reception. Any ideas? Is there anything I can do to improve performance? Could I put on a second amplifier? Would it be possible to put in a second indoor antenna?