Report "I have a Panasonic Viera TC-50AS530UE. Problem is that it powers on with backlights, screen displays picture and sound. Menu and apps are functionally. After about a minute it shuts down and can’t be powered back up with out disconnecting power cord for a little while. I have replaced the main board and the T-con board due to a power surge that took them out. Before I give up and buy a new TV I would like to know what you think this problem might be"