I doubt that happens any more. The whole unit will get swapped out instead. They are not repairable. Everything is glued in and not removable.
I've had a fair amount of apple kit - I've found it to be hideously unreliable, clunky and of dubious design. Detail things such as power isolation is not possible which bit me hard after I had an MBP catch fire just out of warranty.
I don't buy the whole quality argument. Its a perception - not a reality.