There are a couple of issues that can create this message. Please see the different scenarios below.
MEGA Live 2
We recommend that you update the software on your MEGA Live 2 to version 2.150 that contains minor performance enhancements.
MEGA Live and MEGA 360
Open Water Installation Issues - Do's and Don'ts
Water Content Issues - Open Water or Ice
Open Water - Installed on a Boat
The following applies to MEGA 360 and MEGA Live (1st Generation). This is not the case for MEGA Live 2.
Typically we see this message if the boat has a ground looping issue. See below slides regarding proper wiring of these products for direct to a battery or through a panel or switch. They should never be connected through the trolling motor battery bank.
Do's
Don'ts