Almost certainly the map .img you loaded is corrupt. What you need is cure firmware which will enable Mass Storage Mode so you can remove the offending file. That's the reason it's suggested to only use non-OEM maps on a media card rather than the internal memory. If a dud map 'bricks' the device then removing the card fixes it. Go here: [Only registered and activated users can see links. ]. Try QuickCure first, most likely it will work for you.