I sure had a rough day at the park. Took my GTI 2500 out to get the treasure of my life and it TICKED as I went over the target. Blue me away. I could not get it to stop. Evan if I held the treasure seek button, as I went over the target all I got was a series of clicks. Well any way I bagged the detector up and took it and me home, in utter hopelessness. I called Garrett and found out it would only cost 45.00 and was relieved, so I went in to measure it all up to box it up and just tried it out and the lovely thing worked correctly. SO I have come to appreciate it's ability to fix itself. I knew it was wonderful. Tick Tick Petermus