Raymarine c120 won't display
Upon pressing the red power on button, the initial "RayMarine C120 Navigation" screen comes on. Then the screen goes blank and starts over again. It never gets to the depth finder, gps, water temp, etc. screen. Checked all cables several times and voltage to unit, all ok. any help is appreciated.
Boating - Raymarine - C120 System Pack C120 Raystar 125 Dsm300