Samsung galaxy tab 3 7.0 t210

I have a tablet galaxy tab 3 7.0 and i tried to root it , but i failed to root it and then I turned it off . Now it has stuck , it wont turn on . It just says : Samsung Galaxy Tab 3 and nothing else . I tried to hard reset it but i couldn't do it . Everytime I try to turn it off it just restart and stuck on that screen who says Samsung Galaxy Tab 3 . Please help me if you can .

P.S . It wont connect to my PC