Default tab 3 7.0 T210R root fail

tried to root my tab3 ...eveything went great untill i went to manually reboot got the dim crappy screen ....but when i had it go to reboot again i realized that i did not ok the debug option from settings menu before i started....now i get the samsung logo then black screen and music but nothing else......using odin 3.07 and prerooted.tar.md5......please tell me my noob arse didnt just screw myself....update...got it to whipe and restore factory settings but screen is really dark and can barely be seen