It means that your battery is either discharged or does no longer hold a charge. If you have an AC or 12V DC adapter, plug you GPS in and let it charge for a few hours. Then unplug it and see if that makes a difference. If not, you will probably have to replace the battery. Instructions for that are [http://www.ehow.com/how_7464147_replace-magellan-roadmate-1200-gps.html|on here] Good Luck and hope you will soon find your way again...;-)