Firmware Update 4.86 failed in mid-update. Maestro

try and run the firmware update again. make sure the its fully charged or plugged in. this usually works though sometimes it wont depending on what files are missing..they are other ways to fix this problem, but i recommend you call magellan to get it fixed. they will repair any of their gps that were rendered inoperable do to there updates.

you can go here to contact magellan support