Hi bosher69,

I'm very sorry for any inconvenience this may have caused you. Unfortunately, this sounds like it may need servicing. Normally, I'd refer you to our support thread. But just so you know, I support US products and customers. And from what I can tell, this model is for the UK. (Correct me if I'm wrong.) So here's the Samsung UK portal for support on that product: http://www.samsung.com/uk/support/model/PS42A457P1DXXU

Hope this helps you!

Regards,
HD Tech