Thanks for all the great advice everyone. Also, thanks for the tips Andreas, which finally enabled me to get into the case. I took it apart and cleaned it up, which made the picture brighter and got rid of the shadowy spots.
Unfortunatley I hit a bit of a snag. I have very faint vertical lines about an inch apart going all the way across the screen, which are only visible on solid light colors. I think I have something slightly out of alignment. Going to take it back apart tommorow and see if I can figure out what is causing it. I think it may be the polarizers mounted on the cover, as I had a difficult time getting them back into thier slots. Any tips on reinstalling them?