Read the manual, there might be something helpful in that. And I take it you've tried rebooting it by pulling the plug and putting it back. And that it's not still on warranty.

If you were in Harlow I could tell you where to take it to find a bloke who sorts out things like that for a reasonable price. Thta oif course isn't in itself a helpful suggestion, but the point is, there's likely enough someone in your part of the world who can do that kind of thing.

The DIY stores sometimes have a notice board with cards for people who can fix things.