Make sure you have the latest software. http://www.lowrance.com/en/Downloads...tware-Updates/
If you call Lowrance, this is probably the first thing they will have you do.
Note: A hard reset deletes stored GPS data such as waypoints and trails. Copy them to a MMC or SD card if needed.
1. Turn unit OFF
2. Press and hold the the ZIN&ZOUT Keys at the same time
3. Press and hold the PWR key
4. A tone will sound
5. When tone is sounding, release buttons and immediately
press and hold the FIND key.
6. While pressing FIND, a higher tone will sound
7. The unit will reset. Turn unit OFF and back ON.
Fair Winds and Following Seas
Bill H. PTC USN Ret
Chesapeake, Va