Thanks for the reply.
I pulled the card and restored defaults. I even tried going back to the previous firmware 5.840 which didn't help, Then I went back to 6.300 and it still did the same thing. After research I found out about hitting the view button and getting to the matrix boot screen and tried the firmware update there, with no luck. It still locked up on any navigation screen and then all the sudden it's locked on the matrix boot screen when i turn it on and won't go out of it.
Also I have 3 batteries in the boat I load tested all of them and they test good. I tried to swap the unit to a different battery just to rule it out and still same result.
It seems like it's getting worse every time I turn it on. I guess my next thing would be to call HB and see what they say. It was bought in September of 2012 so I know it's way out of warranty. Just stinks to only have 21 hours on something and it break and costs you more money...