Just re-installed my old 798ci at the bow. Bought a new gps pick and I’m using the compact sodescan transducer. Ran dedicated power and wired it all up and when I power it on, it pops ups the normal startup screen and then goes black to what appears to be like a sonar screen but none of the buttons work. Gives an audible beep but does nothing. Anyone had his issue? Can he unit be factory reset while in demo mode? I powered it on a few months ago and it went into demo mode just fine but that’s all I did with it. Any help is greatly appreciated.