Welcome to the Humminbird Side Imaging Forums Buckeye.
Tell us a little more about what is happened. Did this happen while you were using it or was this when you turned the unit on?
This is in your 998c HD Si unit, right?
With the LakeMaster card out of the unit, do you get any of the background maps?
Check the GPS Diagnostic View and see what it is showing for the “Fix Type”.