Look at this post on another Forum (topic ID 127723):
2)How to repair your mio if no connection with pc
look this video to found how to make mio moov upgrade screen [Only registered and activated users can see links. ]
The topic give links for how open Mio and more ;-)
exactly, that is your only option, but it will definitely work. But be very careful in the blue screen menu - if you choose wrong format, your device is gone. I suggest you read this thread very carefully:
[Only registered and activated users can see links. ]
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