iTunes error -1. Maybe Hardware defect?

Hi,

As anyone had seen the error -1 (unknow error)? Any suggestion for solution?

I had read, that is an hardware problem on Nand Flash, maybe right?

The iPad 3 (A1430) wont turn on after an update.

When i disassemble it, i had checked that the Main Board Flex Interconnector is broken.

I had resolder the terminals and buyed an new flex, but i have my doubts that this is the problem. I'm Wainting the Flex Arrive.

Sorry if some English errors :D

Best Regards

Paulo Silva