If you go to the HP support site and enter your model number, they'll send you to a page where you can download all of the manuals and documents available for your laptop.
[link|https://support.hp.com/hk-en/product/setup-user-guides/hp-15-bs100-laptop-pc/model/18164821|HP Notebook - 15-bs168cl - Setup and User Guides - HP® Support]
Following that link will take you to a page where you can download the Service and Maintenance manual for your computer.
[link|https://h10032.www1.hp.com/ctg/Manual/c05493257.pdf|HP 15 Laptop PC (Intel)HP 15g Laptop PCHP 15q Laptop PC Maintenance and Service Guide]
I have to give HP kudos for making their repair manuals available to the general public; not that many manufacturers do that so credit should be given where it's due.
The worry I would have in your situation, Kevin, is that I've found that most laptops mount the display hinges on the motherboard, so if yours is flexing when it's opened, you could be flexing the motherboard, which would be bad, very bad. So yeah, head to page 72 of the M&S guide and that'll get you going on accessing the hinges so you can figure out exactly what's wrong.
For the sake of anyone else who comes along with the same problem you have, you might consider adding pictures of the damage once you get it open, and let us know what it ends up taking to fix the problem once you have it figured out. In fact, if you take lots of pictures as you work, you could use them to create your own guide to whatever repair you end up doing. It's easy, fun and will earn the respect of the repair community in appreciation of your work.
[link|https://www.ifixit.com/Guide/new|Create a new Guide - iFixit]