Television and Home Theater

hello i have a mitsubishi vs-50vf1 52" big screen rear projectional TV. my problem is the screen is alittle darker than normal and it has a curve at the top and the bottom. the curves curve inward toward the center. i have heard of service menus. don't know how to get to them will this fix my problem? if not what should i do or consider? thanks

My Mom and brother are going nuts. I'm hoping there are only a few reasons as to why this is, if anyone could help, I'm desperate! I haven't even ate breakfast yet.    Help!?

Also, the TV is a JVC iArt..

Hi, Ive had my Samsung LE32R74BD a few days and i've got a strange problem with it. After the tv has been either turned off at the mains or in standby for a while or even playing a dvd when I return to watch TV either through the analogue aerial or my NTL box I get a starange green band going from top to bottow of the screen filling over half the screen and the rest of the screen outside this band is fine! Strangely though if i watch tv via the built in freeview in the tv the picture is always fine, even when analogue and ntl are green!