I aquired a TSU-6000 from a friend (with a ton of other stuff) that hasn't been used in at least 2 years but is in real good shape. I got a new battery pack for it and it seems to work. I know nothing about this thing and don't really care to, I am trying to sell it for her. My question is this. I am trying to REVERT back to factory default settings. I found the screen that has the REVERT icon but it is not lit up like the other icons, therefor it will not let me do anything. What am I missing here? It belonged to her boyfriend that was a home theater enthusiast but he passed away over 2 years ago. It still has all of his gear programmed into it. Thank you for any info. Carl