Unless you get a service manual you will be shooting in the dark. Also, when I wanted to dispose of a dead big screen it would cost me 45 bucks at the dump/recycle place. So to avoid that I could give it away (some may sell such!) or wait for a free recycle weekend which is not free either as they ask for a donation.
There it is. Try those tv repair forums such as AVSFORUMS but put on your flame guards.