This thing is driving me nuts. The first 2 months the computer was great, then it went nuts. It would not come on at all, then it would come on while it was sitting in the garage. It would stay on all day. I have replaced replaced the battery 3 times. I have cleaned the connections, checked the magnet position, checked the wires nothing makes any difference. It was working as I put it in the trailer and headed up to Gorman, then as I rolled it out at the campground it stopped. Four days of ridding I get home and it comes on! I finnaly had it and today I took it off when I was adjusting my valves (thanks Jeb for the instructions). I was deciding what to do with it and thought I'll put in a new battery just for giggles, guess what it worked, but as I played with it I noticed the tire number had changer to 505 and my mileage went from 396 to 80,396. I went into set up and changed the number back (what a pain)and everything is working now. Should I put it back on the bike or chuck it? Anyone had this happen to them?