how to fix error 8, on ipad

please help me! im trying to install firmware on my ipad after it stopped working. it wouldnt let me pass the start up screen ''hello'' page. it was just stuck in a loop. iv tried new and old firmware updates and its starts off well but then i get the error 8 message and cant find anything online about getting passed it i believe i have the right firmware iv tried nearly all of them now!! its an ipad 3 model A1430 iv tried recovery mode and DFU mode but still no luck, any advice would be great

cheers, Ben