Hi steve , the code`s can be found at neato.org/~page/mitsu/service.htnl however like Ed say`s you can mess up your tv big time. When I first accessed my service mode I dident change any settings but when I returned to watch tv the pincusion was all messed up I spent the rest of the day playing with it ,.it took me about 4 hours to get it all straightened out.PROCEED WITH THE UTMOST CAUTION!!! good luck, Joe