Light clicking sound when opening display ?

HI everyone,

My Macbook Air make a cliking sound when i open up the display, when I hit the fully extended position (this happen even if I open the laptop very slowly). I had the display changed TWICE because of this issue and it just came back on the third display. Does every other MacBook Air out there does this sound ? I went to the Apple Store and one of the two Air on expo did it.

Thanks for imput !

Chris