Television and Home Theater

Last night i was watching tv and every thing was fine, and then when I woke up to watch the game the screen's green contrast was all outa wack. It looks like you have to have 3d glasses to watch it. someone help!! its a 57 in hitachi ultravision digital if that helps.

I have an 18 year old Sony TV that no longer does the degaussing routine when you turn it on. This was intermittent for a while before a complete failure. I purchased a cheap degaussing coil on ebay that works fine, but... The TV has small speakers built into the cabinet on both sides of the screen. These apparently are not shielded (duh?) and no amount of degaussing eliminates the green corners (there are four separate drivers for the speakers on this stereo TV).

My son has our old 45" rear projection Mitsubishi TV which still has a great picture except that the screen is very dark.  Contrast and brightness are maxed out but I was told by a friend that they had theirs repaired and the technician added a fluid to three tubes and they now get a great picture.  My son does not live near any TV repair shops.  Is it possible to repair this himself?  He has cleaned the screen. lamps and mirrors.   Any help would be appreciated.