Try a reset on it.
First of all hold the power switch over for about 10 to 15 seconds to ensure the device IS turned off.
Then see this from George Talusan @ Kobo
Quote:
Originally Posted by george.talusan
Turn off the device. Turn it back on while holding the HOME button. This will trigger the factory reset. There is no YES/NO prompt - and please don't turn off the unit while it's doing this.
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