After doing a lot of digging around and Youtubing it seems the hinge replacement requires the removal of the screen bezel and nearly complete disassembly of the screen panel… not an easy job, but possible. Looking at videos showing how to replace the LCD from the screen panel it’s apparent that both hinges have cables which go behind the bezel to connect.[br]
[br]
Search for LCD panel replacement Macbook Air and you’ll be able to find a few such videos.