I was on a trip, using my Gold Bug Pro device with the standard 11-inch search coil, and suddenly the device continued to buzz with the Overload message appearing. I moved away from the place, but nothing changed. I raised the detector high and nothing changed. I also tried the other 5-inch disk, and it was normal. I expected a nail or Something similar entered through a crack at the base of the search file. I dismantled the damaged file and did not find any indication of the problem...
Any help is welcome