Yesterday my screen developed a problem,thin green lines appeared across the screen about 2in apart they disapeared after around 10 minutes.Then throughout the evening they came and went.Phoned av-sales and spoke to Andy and explained the situated , he sugested checking all connections and asked if the screen is wall mounted(It is) maybe I've tighted the screws to tight after having no trouble for 3 weeks I'm alittle worried to say the least. Today I tided up all the cables and double checked all connections and everything was going well untill 6pm when they came back.Again for 10mins then went ,the screen had been on for 4 hours wondering if the screen is overheating? feed back from something?or the wall mount needs coushioning?. I'm a little p***ed to say the least as it's taken me 12 months to buy one. Screen is a Panasonic th-42pwd6 connecting Sky through js RGB to VGA into pc port Dvd into componet board x-box in scart board Any advice is welcome do I need to call out an engineer?