Perfect Internal hard drive, but body and screen stripped

I never own a mac before, and still have my dell precision. I didn’t know that Apple has the rule that once you touch your equipment, they won’t fix it.

I had no problem fixing it. Then, something came loose and “a know it all” started working on it. Screws are stripped and it wont reboot. I need a new screen.

Is there a way to get a new case, battery and screen and drop the internal hard drive into place. It actually sounds like it’s still trying to boot up when I start it.