Assuming it’s the black cable…
You won’t see any breaks. It’s a FPC cable (flexible printed circuit) and it’s the stiff kind – not intended for repeated flexing. With the lid open, it has a gentle bend around the back. But look when the lid is closed – it has two sharp right-angle bends at the back wall and the lid.
Again, assuming that is the problem, maybe my short-term hack will work for you: Black Cable Hack for Voiding Warranty