I would honestly call 1-800-SAMSUNG and have a certified tech come to your house to diagnose/repair. That is the only way to get it fixed.
Not sure how big your t.v. is, but there are SOME Samsung repair locations that you can take your t.v. to personally, depending on the size.
I hope this bit of info helps in any way.
Very sorry to hear this, your television may just be experiencing a hardware issues. This is something that requires an in home service. That means a technician would need to be sent your house. You will need to call Samsung, 1-800-SAM-SUNG, call that number and speak to a representative. You will let them know the issues you are having and they will be able to set you up with an appointment to have someone come and take a look at your television to fix it for you.