need help to open my tablet

Solution
There's not much you can do in there other than wreck the device completely.

Leave the tablet on for long enough to drain the battery dry then connect to a PC, laptop or mains electricity and see if that changes things. It has been known for a device connected to a computer shows up in Windows Explorer as a drive so at least you could rescue your music, photos, etc.
There's not much you can do in there other than wreck the device completely.

Leave the tablet on for long enough to drain the battery dry then connect to a PC, laptop or mains electricity and see if that changes things. It has been known for a device connected to a computer shows up in Windows Explorer as a drive so at least you could rescue your music, photos, etc.
 
Solution