Since #Apple's devices are literally designed to be #fragile, I do think it's safe to assume if not demand that having parts from a donor machine should allow one to fix an issue...
Just like on any major brand laptop.
Even #hp and it's #ProBook#Laptops with their #FUD-based #VendorLock for #RAM that literally bricks #PXE and remote/headless/timer-based booting don't literally lock up unbootable if you were to take a differen ProBook's RAM sticks, WIFI, WWAN, SSD, Keyboard, Screen.