my lg tv tuner doesnt work properly on many channels. my old style tv works fine on the same antenna?

It's not an LG tuner problem, it's just a part of the nature of our "new" Digital TV system. You're suffering from what is known as the "digital cliff". One of the few (maybe the only one) advantages of analog transmission was that if the signal was borderline it was often still watchable, whereas with digital it's (with rare exceptions) go or no-go. This phenomenon is described more fully here (see page 3 bottom paragraph):

http://www.quepublishing.com/articles/article.aspx...

The pertinent sentences are: "Whereas an older analog signal might fade and get noisy as you move farther away from the transmitting tower, a digital signal won’t fade. It will stay perfect until that point where it’s too weak to continue. At that point, the picture and sound will simply disappear, often without warning." This is what you're experiencing. You need either better positioning of the antenna you have, or a better antenna. See antennaweb.org for more information:

http://antennaweb.org/Address.aspx#

Just input your zip code and click Submit and it will tell you what stations you should be able to receive and even what kind of antenna to use (they are even color coded to match color coding on retail boxes at the store). If it's an indoor antenna, you could try moving it around or get an amplified one, but the best option for marginal reception is a larger outdoor (roof or indoors in an attic) mount and should even be aimed correctly. Hope this helps you figure things out - often it is a trial-and-error situation. Good luck!

Lg Tv Tuner