3year old Panasonic ct-32sx12f dead?

Sure, Why not?
It is worth the effort.
If the set is 'dead', it is the easiest to repair.Only 'tampered' sets pose problems.
It could be a simple blown Fuse, or the Power Regulator IC.
This should not cost you more than $100-150 as Technician charges + 15-20$ for spares.
It could also be a defective Horizontal Outut Transistor and short cicuiterd FBT, (tho' it seems remote), but if yes, add another $100.

definitely worth calling a professional techie