shadows in picture on a lcd tv ?

It has a bulb?

Its LCD not rear projection if I read correctly, may be time to explore a new one. They just dont make things like the old days.
If it is an LCD and not a RPTV you may want to look at AVSFORUM.com as the knowledge of video is far more complete compared to this site more focused on audio.

There might be lint on the lens. Some rear projection tvs have access panels on the sides. If it does, you can take one off and look in while the picture is on. If that's the problem it can be cleaned with a vacuum or lens cloth. Be careful!