I have serial number hd52w59

the fl231 fuse problem will apply to any itc222 chasis set. The hd52w20 is an itc22 chasis.. although i have not seen it in that set if you do not have the convergence option in setup. that is my first choice in possible problems. a simple ohm chech of that fuse can determine if it open. Warning this television can generate potetial leathal voltages care should be taken when working with set with back off.