I pluged in my Magellan Roadmate 1200 in to the

I pluged in my Magellan Roadmate 1200 in to the computer with the usb cable thinking it would charge. It now says it has a fatal error and that screen won't go away. Did I erase the memory on it? I should've read instructions that said don't plug in usb cable until ready to update it but I didn't. Any help for it or is it just toast? I am not too computer literate so if the fix is too complex, I may just have to trash it! lol