@Laemmergeier_info, you mix a lot of things. There are hardware damages, like the screen, you tried to fix it somehow yourself, you have problems with the touchpad and look for hardware and software solution and think about changes in your firmware. I would suggest, sort yourself out a bit and bring it in a logical structure, summarizing the hardware situation and post output of
inxi -Fza
and then explain again your issue and solutions you tried.
It could be helpful to have a look into this link: