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I will need the model number please found on the back of the set?
When you say goes off do you mean it goes black?
Yes that is the model, OK please perform this test, when the picture goes off (I am assuming to black) please press the menu button of the sets own remote control does the menu come up please?
OK when it does this again please perform that test it will tell me a lot about what is happening, just come back here with your reply
I will await your reply there is no rush take your time
OK it will no rush just reply back when it does