Have a Samsung DLP HLN5065 that is about 5 years old. Picture is great, but 2 days ago, it would not turn off. It will not respond to the remote or the side keys. Matter of fact, none of the side keys will work right now. I, forgive me, pulled the plug, left it off for about 5 minutes, plugged it in, used the side keys and it went on. Left it on for a few minutes and then tried to turn it off. Same thing, it would not respond to the remote and all of the side keys did not work. TV has been on for about 3 days straight right now. Thanks for the help.