The Non Xmas Xmas Film Is On...
Film, Media & TV0 min ago
No best answer has yet been selected by yumyum. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.If it's only the top few lines that are not working then it sounds like the elements have been damaged.
If the screen has been cleaned with something abrasive or scratched in some way, the elements can be damaged. Take a look at them so see if there is any damage - should be a continuous line all the way from one side to the other. You can buy conductive paint to repair damaged elements but don't know how satisfactory a repair is using this.