I had same issue from day one, I think the automatic ground balancer gets stuck, my display screen jumped as if the Titanic was a foot under my lawn.
1. Cheap batteries, not sure why that caused issues my display said full charge and batteries were brand new.
2. Reset button, worked on this unit twice..
3. Underground electrical wires had my unit screaming like a fat girl on prom night.. Took me a day of non use for machine to ground itself again. Why.? Probably because I paid 300, not a grand for a solid unit..
4. In short I have wasted countless hours in the three months since my purchase of this machine! Although I'm not an expert in this field, I know when I've been sold a flimsy pacman looking machine that sends off more false alarms then a kardashian pregnancy test.
Have I found treasures with my ace 350 on every hunt? Yes, this machine will beep walking over metal, so would and conductor bouncing signals through the atmosphere off metal surfaces... So far I haven't heard the difference between hundreds of coins I've dug next to bottle caps, the headsup display settles on one of ten choices and dances all over the screen. Metal !,,,, yes but what kind? I have to dig everything.
Mr. Garret should call Asian production plant and tell them to stick to calculator watches, I'm going to give this unit to my rain man 6 year old nephew to keep him busy as I invest in something a bit more reliable..
Target I.d my Ass, I've got a better chance call in Dion Warwicks hotline for predictions, or finding a better use for pull tabs that sound off like change on a daily basis.
Thanks for reading, I'm never shy about my opinions, if something blows I'll be sure to let you know....