I purchased a 50 inch Colby TV a while ago and started using it now. I am using only an outdoor $30 antenna that supposedly has a range of up to 100 miles. I am only able to receive about 5 channels, namely, me TV, get TV, grid TV, WGN. I cannot get basic channels, like, CBS, NBC, ABC, public television etc. Is the problem the antenna or something else? I hope it is not the TV because Colby is out of business.