My Edge 830 has started a procedure "Updating GPS firmware" while I am riding. After a while it states "GPS firmware update succesful." During the 3-5 minutes is updates it locks the 830. After update the GPS does not work anymore. I can still access power and HR. If I shut the unit down and on again it will start working until after a while the whole thing starts over. I have tried leaving it but the cycle still comes back again with new updating gps firmware procedures. I have done factory reset twice. I have made sure I was in high speed internet environment so update could be done without interruptions. Started a few weeks ago.