Onn sw8411 hdr no picure?

Hi, I have an Onn SW8411 HDR hard drive dvd recorder. It has worked fine but is now only playing sound, on either dvd or a hard drive recording. The picture is just the screen split in half vertically, one side black, one side white/grey. I have tried several scarts which I know work. Is this worth repairing. Any advice greatly appreciated.

Many thanks, Tabitha