Hello I have had a xterra 50 for a few years and this is the second time it has been to Minelab for the same problem. after a month and a half they called and said it had a bad board again it seems.They want 225 dollars to fix the same problem. I also have a explorer se. I will NEVER own another Minelab metal detector. Watch for them they will be up for sale on the classifieds section. JonPa