Today when I turned on my 550 the panel went berserk. I tried new batteries, but still the problem was not resolved. I tried resetting the unit holding the power button 10 seconds. At the lower panel it reads A B and pinpoint. The bars on the upper and lower side kept moving like movie marque lights while holding the pinpoint button. I tried to call Garrett but closed til Monday. Twas a beautiful day for hunting then........ Bam. Has this happened to any of y'all.