Before reading below there is a common issue with these tablets where they do not turn on properly or get stuck on the charging battery icon. Try holding power + volume down for 10-15 seconds and attempt to turn it on and or charge it again.
Try leaving it on charge for half an hour if that does not work you may need to do a factory reset or reload the software on the tablet in order to get it working again.
Usually when the Tablet is stuck on the animated Samsung Logo you may need to do either a factory reset or reflashing firmware on tablet (same android version or newer).
If you need to keep the user data (photos and etc) try flashing latest android system firmware first by following instructions provided in link below:
If firmware flash does not help then a factory reset must be done to get the device working again.
Disclaimer: I am not responsible for any data lost from your device when you follow the steps below:
To factory reset:
Hold power button + volume up + home button until Samsung logo appears. When Samsung logo appears stop holding the power button but continue holding the other buttons. Once you get into a recovery menu which usually release all keys.
Use volume keys to navigate the menu and the power / home key to select the highlighted option.
Do wipe data / factory reset. Wait for this to complete and reboot tablet.
If this still doesn't solve the problem then you will need to restore firmware using Samsung Kies (ODIN downloader flash method works too).
- Stuck on white Samsung Logo usually means device is soft-bricked (Recoverable using firmware flash), caused by a bad battery or insufficiently charged battery.
- Stuck on animated Logo usually means the partition on the device that is used for user data is corrupt and needs to be wiped by doing the factory reset method. It can also be caused by corrupt firmware too. You should attempt firmware flash first if you need to keep user data that's on the device then do factory reset as that is the only option after that.