So I took my Ranger boat to a dealership for some service. The dealership suggested I take my graphs with me to prevent the possibility of theft. I simply unhooked the network cable and the power cable from my livescope. Livescope work just fine before I removed. Got the boat back and hooked livescope back up on the boat. On the water today, the livescope would power up but a message popped up saying " source not found check network".

Any one seen this message before and what did you do to fix?

It's not seeing the transducer.

It's not seeing the black box. The livescope has a black box that does all the heavy lifting. Make sure the box it's still there..

As said, make sure black box is still there. If so, then check to see if getting power to it. May be a blown fuse

If your units are identical, switch them around. It’ll show that message if you have them bassackwards.

I get it at times, Turn off and back on usually fixes it.

Disconnect the plugs, clean them with light compressed air…BE CAREFUL, the pin on the plug are easy to bend. Make sure they seat fully when reconnecting. It’s usually a small amount of corrosion causing an open circuit that causes the transducer to not be read by the graph.