Thank you for your quick reply,
My device is not detected by none, pc or mac. I have tried register my product and it didn't work and now that I downloaded the webupdater my device is not found by the program. As far as your second recommendation is concerned I have already tried resetting the personal data and it didn't work.
a screen which says to enter a pin.
I haven't set any pin. That's what I don't understand. From the first time I switched on my device it required some pin that I never set.
I bought it from amazon in Germany. Supposedly it was new.