"Carefully pull the camera cable out of its socket on the logic board."
I followed these instructions to the letter, heeding the warning to pull vertically.
The camera cable broke at the connector.
The connector was pretty tight in the socket. Had to use a tiny screw-driver to free it. There was no way simply pulling would have worked.
A quick google of "macbook pro camera cable broken" shows that this has happened to many other people, and been reported to ifixit. But no mention in the instructions. Disappointing.
The MBP no longer boots. The cable is soldered to the LCD, which must be replaced. $500?
Someone, PLEASE fix the instructions. It looks like many people have been hit by this.