my garmin nuvi is stuck in demo mode loop. so cannot use it another problem is no matter how long i charge it comes up low battery hence totally us thing
have used tools ,settings system, turned gps simulator off,told it ok, the screen then shows its back in gps on mode,the demo mode then restarts

david, October 2011

fixed it I got the software SD from a garmin tech guy to fetch it out of demo mode works now

david, January 2012