I have tried to download the instruction manual but I just get a load of goobleygook coding in a word doc (something is probably wrong my end). I have a Cateye velo 5 bottom of the range computer. Everything on it is fine except the distance function which is not working when I spin the wheel. The magnet is in place and all connections seem ok (although it behaves as if there is a loose connection i.e it works intermitantly for a few seconds then goes off again). It has not got wet and I can timagine it's a battery fault as all the other funtions are ok and the display looks normal. I tried a gentle tap....should I beat it harder?