In my 2011 Jeep Grand Cherokee, the 403N media center is malfunctioning. When I press NAV, it is stuck on the GARMIN boot page. I cannot get it to change. I have even tried to upgrade from 23.xxx to 33.xxx and 50.xxx The upgrade will not finish. I get to 100% and then it goes to a blank UPDATE HDD FILES page for HOURS. Pulling fuse returns me to original state. SAT, FM, AUX all still work perfect. HELP
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