I have a 997 side view with transducer an antenna in the front and back. The other day I found a creek on a lake I don't normally fish so I put my unit on the conso mad a few waypoints moved it back to the bow and my waypoints were gone. As I look more al my waypoints are gone and maps. Called hummingbird and was just told to send the unit back with about $300.00 and they would look at it. Has anyone every had this happen or know someone around Nashville that works on the unit. I hate to send it off right now.