I just bought a boat that has a Furuno GP32 already installed on it.

When I power up the unit all I get is a greenish backlit display..... no text or anything else. When I try the menu button nothing appears.

Any idea if this unit is shot or am I possibly missing something?
Once the unit is on breifly press the power button again.
The left/right arrows adjust the contrast and the up/down arrows adjust the brilliance.
If nothing appears on the screen and you have confirmed good voltage to the unit it will most likely need service.
You can take it to a local dealer or send it to our Camas, Washington office.