Run self test and LCD test: Power unit on while holding MENU/ESC- press down arrow to TEST then right arrow to start. When self test is complete use down arrow to go to LCD TEST, then right arrow to start. Press MENU/ESC for a while screen the MENU/ESC again for vertical gray bars. Press MENU/ESC 3 times to exit. The LCD unit is pn 000-145-512, $175. I strongly suggest you not attempt replacing the LCD yourself unless you are a qualified Furuno tech.
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Run self test and LCD test:
Power unit on while holding MENU/ESC-
press down arrow to TEST then right arrow to start.
When self test is complete use down arrow to go to LCD TEST, then right arrow to start. Press MENU/ESC for a while screen the MENU/ESC again for vertical gray bars. Press MENU/ESC 3 times to exit. The LCD unit is pn 000-145-512, $175. I strongly suggest you not attempt replacing the LCD yourself unless you are a qualified Furuno tech.