If you get a chance to see the RCA before you buy it, on top of the HDTV there are a number of buttons. For the Service Menu. Press: Info, Menu-OK and right side of volume (plus). Put your 3 fingers on these buttons at one time, if you did it right you will see a darker color of grey, in towards the middle. Or a Service Menu depending on how new that particular set is.
Take your purple button in center of remote and with what ever color you 'chose'(Blue, Green etc) push right arrow. Hit OK button and HDTV will start doing its own diagnostic tests. One by one if alright you will see OK in caps.
Odometer reading of hours used, go back to Button to left. Odometer, 'again' choose right arrow and hit OK button. Hours used will be displayed. Get out of Service Menu at 'any' time hit clear on lower right purple button your using.
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