When I turn on my TomTom 300, I can not access certain keys that are dimmed (Base, Favorite, Find alternative, show route, Clear route), I therefore considered a reset. The reset on my TomTom 300 does not work. The data are not reset. Also image on the screen freezes, I can not make any intervention. Despite having reset the device several times. Also have the no screen display sometimes. Please help.
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