Al sorry to hear that buddy. Sounds like you definitely have a issue. Always one bad one in the bunch seems like. Garrett is the best in the business about warranty work. Heres some info for ya

If you are sending a detector to the factory for service, follow the steps listed here OR complete the information form below.

Request Return Merchandise Authorization (RMA) number from Customer Service (sales@garrett.com or call 1-800-527-4011 Toll Free 8:00-4:30pm Monday-Friday CST).
Enclose a brief note with the detector and searchcoil which briefly details the problem you are noticing along with the RMA number.
Please PRINT your complete return shipping address including your name, address, zip code and a daytime telephone number.
Send the detector and searchcoil to:
Garrett Metal Detectors
1881 W. State Street
Garland, Texas 75042-6797
Attn: Customer Service

XP, MINELAB, GARRETT, NOKTA Detector Sales
Local Nevada swinging buddy & dealer friend
Liebelt1@gmail.com 775 388 8277