samsung galaxy s3 samsung logo flashing keeps restarting
Two days ago I got the official update of jelly bean 4.3 to my Samsung galaxy s3.Last night phone was dropped with in small height. Today morning I switched on the phone its worked fine. But at the evening suddenly my phone was restarted and Samsung Logo Splash Screen (Samsung galaxy S3 GT-I9300T) and Keeps rebooting. So I remove the battery and insert it after a few second. After that the phone worked fine and again the same problem happened.
if I remove the battery, phone switch off. And if I insert the battery again, phone switch on itself (without press power button) and keep restarting.
I try to open the (Home + Volume Up+ power ON) button option. But is not working. If I plug the phone to charge, gray battery shows and again restarting to charge. (I mean, phone wont stay in a stage).
If i try (HOme + voulme down + power On) option, phone shows the download mode for 5 seconds and restart again.
So can you please let me know its a software problem or hardware problem?
If its a software how fix it ? ( I tried the emergency firmware recovery through kies, but kies couldnt fine my phone).
My phone current status video below
Note : this video i download from youtube, bcoz i wanted to show u the current situaltion. ( But my phone in critical rather than wht mention in video)