The other day I was MDing and a friend saw me and stopped to chat, so I turned my Safari off and talked for a few minutes. When I went back to MDing I noticed I wasn't hearing anything from the machine. At first I thought I was just in an area where there wasn't anything in the ground, but then I looked and the TID numbers were jumping around. My first thought was that my headphones had come out of the jack, not the case though. When I would stop swinging the sound came back on. As soon as I move the machine it goes silent. So I started to look things over then I started to get sounds but not the nulling sound. By "move" I mean literally pick it off the ground an inch, not even swing, just straight up. So I called it a day and went home a little disgruntled. I let it sit for a few hours and thought about it, maybe it was the coil, so I changed out the coil and all seemed good. I took it out again later and that coil started to to do the same thing. But then I took it again the next day and it worked great for about 2 hrs then started again. I put new batteries in it. So I am wondering if anybody else has had this problem and what they did about it. Thanks in advance for any help.