I was thinking it might be the tuning, but I can't find the fine tuning control. I'm guessing since it's a 2000 model, it's synthesized. The smear is there at all settings, so it's gotta be something else besides the tube.
Edit:
Gawd dammit!!! While I had it open I had the screen face down on a desk and now there's a big scratch in the glass. So much for this TV.