I opened the thing to replace it with an SSD, and I can tell you that HP doesn't want anyone inside those machines.
not just HP
when my daughter gave me her acer ZG5 that would not boot her words were, her stepson [in his 20s] could not fix it, so I had no chance, it came with puppy,
when I got home [took about half hour] and plugged it in, i imitately spotted it was a password problem, so with a quick sudo -sudo-su, I had the password changed and working, so in less than an hour I had phoned her and said … what's the problem it works fine, so she said keep it,
I still use it for travelling, but I had to upgrade It, never having worked on one I set up the dining room table with plates saucers all with labels of where the bits came from, I discovered it was missing about 8 screws [lucky i had spares the right size] but when it was spread out on the table I had 3 parts for the case and 128 individual parts cables and screws to go back. Since that I decided Laptops were easy and started repairing them as well as boxes.