@cjs75: I'm sorry to hear that you have experienced this issue with your TV display. Based on the nature of your query I recommend arranging for an engineer to inspect the TV, which you can do so by following the link below.
https://www.samsung.com/uk/support/repair/
Repair costs can only be provided by the assigned engineer following the inspection process, and can vary depending on your warranty status. Please be assured that any quotations will be issued prior to the repair going ahead, allowing you the chance to opt out of the service.
