basically, this is my 3rd replacement macbook pro, the first two had a broken enter key, and this new one seemed perfect at first, until yesterday its started to click when i open the lid, just wondering if this was a common fault? and if theres a fix? im just not sure if its worth getting another replacement as its a very quiet click, like a spring or something in the hinge? im worried another replacement will be the same/worse. thanks.