I spent the past several hours reading and reading. I tried to upgrade this Tablet to Jellybean, now the Tablet only reaches the Samsung glowing screen.
I tried several fixes to no avail, my first hurdle is I have no idea what Product code to place in to get the firmware from Sammobile as I dont know where this tablet originated from, possibly England. I also followed a tutorial on how to restore back to gingerbread 2.3.3 which gave me the same result; I think I have to go back to Froyo 2.2.
So I followed the tutorial from the answer on Restoring original 2.2 firmware on Samsung Galaxy Tab GT-P1000L.
Again no luck, I think I need to restore everything. As I'm a noob maybe someone can point me the right direction? Also in the above tutorial I downloaded some PIT files, and I have no idea which one to use. Picking the correct firmware from Sammobile and PIT should reverse everything as I did load a modem file in the first place.