I received an email from Tom Tom today saying they have a download for a GPS fix since my unit has been having issues with this. I did not solicit the email from Tom Tom, so apparently it must have resulted from my latest update of my SD card from my TomTom Nav1. I will try it and let the forum know if it fixes the problem. My unit has had 2 occasions over the past 3 weeks where the unit would not get a GPS fix on startup until about a half hour or so later or until the vehicle was shut down for an while. A quick shut off and startup of the vehicle did no good. We will see if the fix download cures the problem or not.