Took the boat out for it's first outing this season. and the HU (Fusion MS-RA205) will power up and read "Fusion" logo on screen and do nothing else.
I actually testing the system out in my driveway before heading out and it worked fine. but once on the water this is all it would do.
I tried: removing power (via battery switch), rebooting from HU (by holding power button for a few second... it would shut down and then come right back up and do the same thing), i unplugged checked and plugged back in, everything on the back of the unit. and all of the above several times.
I have a remote AUX switch wired to it and also turned that off and on several times w/plenty of "reset" time in between.

Is it toast?