Hummingbird 587 help

[A Cubs Fan]

I turned on me hummingbird 587 sonar this morning, and all the waypoints were gone. It worked just give yesterday. I did not install new software or any of that.  After doing some quick research on the Google machine, it said to restore to factory defaults. This did not work.  When I went to save a new waypoint, it started at 1.

I'm assuming they are lost, and I don't have a backup. I guess I learn the hard way, but any help would be appreciated