What kind of TV?
What size of TV?
What's the overhead space like?
What is your budget?
What's your turn around time?
What do you have at your disposal to fabricate if that is the road to go?
I would grab someone who knows metal work and head down to the auto parts store and talk to them about pressurized shocks that are used to assist with lifting a flip up back window or gate on a car. I don't know a lot about that stuff but there's a solution there that isn't too expensive if you are clever enough.