1, My Raymarine RN300 GPS unit display screen (right half of screen) is not displaying at all. The unit is fully operational. It is an lcd screen, so I tried to gently press on the screen to see if there was possible a loose display connection, or if the unit or screen/housing was warped, but...
If you acquire a used RN chartplotter RN 300 and need knobs for your install using a Yoke, I have a pair. These are smaller knobs than used on the RL80 pathfinders. I've got a picture of them if interested. They are clean.
Knobs for new equipment sell for $13.00 plus shipping. Let's call it...