Removed the bezel. There is a black plasticy-paper-like “barrier” (?) material along the bottom of the screen. Some areas of this show “air bubbles”, and when I lightly push on the bubbles, it makes the same “clicking” sound.
Then when open/close the lid, I saw the two wires on either side had super sticky excess tape that was sticking to this “paper” when closed, then pulling the paper while opening, which caused the “click” sound. I very carefully removed the excess from one side with an exacto knife, the other had too little to try removing so I put some lotion on my finger to make it adhere less to the paper.
Also checked the hinge screws while there, one needed just a slight turn to snug it. Not sure if that mattered as far as sound.
Now I can just barely detect some mechanical hinge movement sounds but the actual “click” is gone.
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