Even assuming the manual is available, a video game HUD overlay will still only be of limited use when the thing I’m trying to fix is put together with biblically accurate tamper resistant screws that strip even if you manage to find the correct driver bit, plastic tabs you can spudge open exactly once before they snap off, unmeltable adhesives known to cause california in the state of Cancer, ribbon cables as thick as spider webs, firmware last updated two olympiads ago and whose latest version is bigger than the device’s storage could ever fit anyway, a bootloader more tightly secured than any other software on the whole device, and components from a parallel universe made by companies that have never existed.

Also it will turn out that the AR repair manual is actually for a slightly different revision than you have and somehow everyone else on the internet has the more common variant.