There comes this time when you cannot figure out why the machine isn’t doing what you’d like it to do. In these cases please remember to perform a Factory Preset. This will return your detector to the settings that it contained from the factory. On the GPX series of metal detectors, turn on the detector by pressing down and holding down the power switch. Keep holding the power switch until the factory preset tune is played and the factory preset menu is displayed. At this point you can decide whether you will reset ‘All Settings’ or just the current mode. To reset the whole detector choose ‘All Settings’ or if you are experimenting just select the current mode. Note that anywhere you see the text FP in a small box relates to the factory presets.