Although Plasma TVs are not my favourite thing in the world, I have to admit that LG, Panasonic and Samsung have made some rather nice ones. Some are more repairable than others though, and LG's 42PQ3000ZA can usually be repaired for a reasonable fee compared to most - If your 42PQ3000ZA has been struggling to turn on, clicks on and off with a red to green back to red standby light then it can usually be repaired (ideally the sooner you bring it in the better).

Other models included are:

LG 42PQ3000
LG 50PQ3000
LG 50PQ3000ZA
LG 42PG3000
LG 42PG3000ZA
LG 50PG3000
LG 50PG3000ZA