Hi all..I desperatelly need help on this one. When i am swinging my CZ3D back and forth, it will make a noise such as when you locate a target (coin) Most annoying and problem is that it is intermittent. I sent it back to Fisher last year, they had it for a week and could not find anything wrong with it. I do know what i am speaking about, had this machine for several years and have been a VERY active trshunter for over 40 years now. I have tried changing the batteries to no avail. Does anyone else have this problem? Please help if you can? I would so appreciate any help on your behalf and thank you in advance. Pleae respond to my e mail address at Trshunter@aol.com.