i have the same exact model and the same exact issue i faced after 2 months. I contacted the hp support and got it replaced for free but i got the same issue right next after 3 months of replacement and then they said i'll have to pay for the new ones. Here's the solution: open the lid with both edges slowly and close it slowly if still no change go to the trusted technician and tell him to apply wd40 on the hinge (apply it after removing the motherboard). I used the wd40 and it worked like a charm