Available Download link For Samsung Galaxy Tab GT-P7300 below on this page. we are share always upgrade flash file and you should use upgrade flash file for flashing your device. at first check your tablet hardware problem then flash your device. if your device have any hardware problem fix this problem first then flash your device.
make sure your tablet battery is not empty. if your device is turn off without complete this flashing process device will be dead.
so you should keep battery charge 70% up.