I hope someone can help me. I am rather new to detecting but I did buy an AT pro 13 months ago. I realize this might sound weird but I have only used it a couple/few times and it has worked good. Tonight I turned it on and it goes crazy. Beeping, tooting, dinging, farting, numbers on the graph are jumping all over the place. Battery's are good. It does this when I hold it in the air. I bought it from Antiques Detectors from this site. I haven't contacted them yet hoping someone here has an idea whats going on.