IMHO, I believe that Kawasaki has a problem with these displays....and as you know, they are not cheap to replace. I believe that it is a condensation issue that corrupts the electronics behind the display. Our 2006 STX-15F with only 20 hours rolled in the surf for an instant; and was immediately recovered, put upright and driven away. No water intrusion at all was noticed; however, the display quit working. I removed the display that day, pulled the rear plug and water came out. Not salt water, but fresh water. The state of corrosion suggested that it had been happening for a while.
My theory is that the water was laying in the bottom of the display and when it rolled, it shorted out the display. By cleaning the display's insides with alcohol, using an air gun to blow out the alcohol, and by placing the display for several hours in an oven on warm, it did recover.
Instead of being sealed so tightly, there should perhaps be a drain hole in the bottom. I'm not sure if that would allow more water in or the condensate out, so I didn't do it.
This has been my experience
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