- Try holding the on/off button for 10-15 seconds to reset it to default. That may solve the problem.
- Make sure all your connections are tight and screwed in all the way. Because of the "O" rings, you have to add a positive pressure while turning the threaded support, so it seats all the way and makes a good connection.
- Check your batteries...are they good? Proper polarity? Are all cells working? One malfunctioning cell will cause a lot of problems.
- any EMI interference from under ground or over head wires? Florescent tubes in the house should be turned off if turning on a metal detector
- do you have access to another coil to see if it possibly the coil that is having issues? Switch coils and see what happens.
- Is your detector ground balanced?
- if by chance the stream is salt water, you need to wipe your coil clean.
If non of this helps.....please call Garrett at 1 800 527 4011 and ask for Sue. She will look after you. She is very knowledgeable with metal detectors, as she and her husband also detect in their spare time. Hope you get your issues resolved. Unfortunately electronic equipment can fail sometimes. Nothing is immuned from breaking 100%. On the plus side, the metal detector is built in USA, by a company which puts a lot of effort into customer service.
Good luck....wishing both of you a speedy recovery to your dilemma.

John
Edited 1 time(s). Last edit at 02/19/2012 06:58PM by John-Edmonton.