I have had the above TV since 2012. As with many plasmas, it has always buzzed occasionally on bright scenes, but just recently it has been getting much worse. The buzzing is much louder and more frequent. Last weekend's Doctor Who episode, which featured a lot of scenes in bright white sets, was really hard to watch because of all the buzzing. On my wife's Russian satellite TV, it is almost constant. I was hoping to use the problem as a pretext to upgrade to a 4K set but the "accountant" is having none of it, so I need to find a fix before it drives me insane. Is there a solution I can try myself or do I have to call in an engineer?