If you don't get a Tactile response from the home button :"On the back of the home button there is normally a small gold circle with a black dot in the middle. This is Kapton tape with a small black nipple maybe the size of a " . " so very tiny. You can see this in the pictures above. This small dot makes contact with the silver nub on the bracket to get the button to have the tactile button press. It's super small and almost looks like a ink mark or paint but its actually needed to get the button to do what it's supposed to. I used one off a replacement home button and glued it back but I was told it can be taken from the back of an iPhone 6's home button too. Can not tell you how aggravating this was."

Ok so I've found out what is causing this from someone with more experience than myself. On the back of the home button there is normally a small gold circle with a black dot in the middle. This is Kapton tape with a small black nipple maybe the size of a " . " so very tiny. This small dot makes contact with the silver nub on the bracket to get the button to have the tactile button press. It's super small and almost looks like a ink mark or paint but its actually needed to get the button to do what it's supposed to. I used one off a replacement home button and glued it back but i was told it can be taken from the back of an iPhone 6's home button too. Can not tell you how aggravating this was.

That packet of white beads is more than likely desiccant. Its used to remove moisture from the surrounding area. Probably trying to keep water/condensation away from the lens and electronics inside the phone. I don’t see it to verify for sure but my experience and your description makes me think its desiccant.

I just tried repairing one of these from a OPJA100 model that was having boot looping issues but the 45 pin connector broke while i was removing all that dang tape. I ordered a new camera board and charge port since they were relatively cheap but neither fit the version of the phone I was working on. I know it is an HTC One M9 but I don’t know the different hardware versions of that. I’d like to buy a donor phone to use to repair the one I’m working on but dont want to waste money on a phone that doesnt have the correct hardware. What am I missing?