My new 28" JVC (AV28BD5) telly don't wan't to give me a good picture. Whenever there's a dark or one colored picture on the screen, there's also lots of ugly lines running diagonally over the screen. Im getting really ****ed at this as i've done all the tweaking you can make but still the same damn lines! i also figured that it maybe was some nasty interference in the pile of cables behind the tv so i plugged in another tv(Grundig 25") and what do i see? No lines or interference what so ever! It must be something with the JVC. thankful for all help i can get.