i have a 32wlu530hid lcd hd ready tv and when i switch it on the menu and picture is visibly but smeared smudged odd colours like spaced out sometimes purple vertical spaced out lines after switching on and off say 50 times it can go 2 days sometimes and its fine backlight works fine sometimes it will be all black but rare what parts do i need and where pls sound pops the first time i switch it on