Can't turn on Samsung tab 4

My Samsung tab 4 when I press the power button it turn on and then it ask for password and after receiving password it shut down again. Again I press the power button then same thing is happening again. I'm not able to get in the tab. I connect with laptop was able to open properties but didn't know what to do.there is two tabs General and Hardware. If any body know what to do please help me. Thanks