Yes our Garmin is old, got it refirbed in 2010 for a trip back East. It's been awesome all these years. This past weekend going South into New Mexico I noticed that the vehicle symbol had turned at a 45 degree angle and the map seemed to stop moving though the time to destination and speed updated. In a short while the screen suddenly showed a full window with the message that no maps were found and no navigation was possible without them. I pulled the power cord which immediately shut it down as I've known the battery is old and doesn't hold a charge. I waited a few minutes and repowered it. Same message. I thought it might have been heat affected for the first time. I held it in front of the ac duct to cool it, then plugged it in and placed it in the instrument cluster well out of the sun. It came up and seemed to work for a few miles, then crashed again. It did that several times around Albuquerque and on the trip Sunday back to Colorado. Is it too old to try a battery replacement? Is it just too old period? Connecting it to the Garmin update site says it's all up to date and OK. No indication of any problem internally. Just tried to start it in the office here at home and same message showed up, "No detailed maps found that support routing. The nuvi cannot be used without them". A couple of years ago we installed a 16 gig Sandisk card for more memory. Has it outlived its usefulness? What is the current equivalent Garmin model?