im trying to hook my xbox 360 up to an oldr rca tv(model#j25230bl) i bought from a hotel that was closing down it came with a small universal remote and nothing else i have the rf modulater and all the cords and such are in the right place but try as i might i cant get it to work so my question is how can i change the inputs on this tv channels three and four dont do any good i read online that channel 91 or 92 would work but my tv starts at 99 then goes down to 95 then skips to 79 and on down from there