use the search and look for : how to recover hard bricked devices, I am pretty sure there is something you can do, and if everything fails get it to Samsung repair service and ask for help.
good luck my friend, the only advice I would give to the people who own such devices is DO NOT FLASH YOU TABLET FOR NOTHING! IT IS A USFUL TOOL TO READ AND MAKE PHONE CALLS NOT FOR BETA TESTING ALMOST ANY AVAILABLE ROM OVER THE NET.
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