My AV20D303 wont cycle through the input options: Video 1, Video 2, Video 3, 03. I can only get it to show 03 ( our cable channel) and the Video 1 option. It cycles directly back to 03

Something called the Service Menu popped up and before we could exit the menu something must have gotten changed, because after that the input button does not work correctly anymore. Can someone tell me how to get the service menu to re-appear. I would be very appreciative for this.

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