Came home from work today and there was a box on the porch. It was my ATpro that I sent back to Garrett to have it checked out since I could not find anything deeper then four inches. When I opened the box to check it out no explanation as to what was wrong with the machine! I called Garrett's customer service and asked what was done? They said they had to replace the circuit board and the connection plug to the coil. They said it checks out fine and there should not be any more problems. Will test it out this weekend and give feedback on the results. Thanks to all that responded to my first post on this issue.