If you never decrypted it, and your PIN does not work, then you will likely have to do a factory reset for the device. I would suggest you call the manufacturer first, in case there is a product specific code help they can give you, otherwise I found this page which includes methods for a Factory reset for many models.
I hope it helps, but be aware that any data you stored will be lost, in the process, excepting anything stored on an external device.
http://www.androidtablets.net/threads/how-do-i-factory-reset-my-tablet.62022
×