how do i tell if the fault i am seeing is an UNFIXABLE screen fault.Well thats a good question,if you have a coloured line down the screen,or multiple lines.A bar down the screen also.Tea staining or cloud effects or any dark patches.Left part of screen ok right side dark or lighter,might be t-con board or ribbon but prob screen.Darkish picture with a slow motion effect.Any cracks to screen itself are unfixable.Switching on and seing a spiders web effect anywhere on the screen.somtimes a rolling bar accross sreen.prob lots more maybe my betters would like to contribute to list. Hope nobody minds all this if so will stop,But cant see it harming any real engineers.