I have a Samsung model UN32EH5300FXZA smart tv. It is only about 2 years old. Was working fine yesterday morning. Got home last night and turned it on and no picture, but it does have sound. I have tried to troubleshoot problem. I do have back lights when I look at back of tv and when I shine a flashlight into screen I can see the picture. Would this problem be the tcon board or the main board or ??? Please help. Thanks in advance. 