i bought a 42PFL4606H a couple of years back and haven't been using it for a while. but yesterday, when i decided to watch some movies, i turned on the TV, the red dot (the one indicating that the TV's off) dissappeared, sounds came on and it was clear the TV was on, but the screen was black. i'd greatly appreciate if anyone could help me out as i'm very pleased with the TV and want to fix this issue