Are they fully discarding it? Or just replacing it? I actually don't know the answer here, but I'd be surprised if they didn't have some refurb process for remo

Are they fully discarding it? Or just replacing it? I actually don't know the answer here, but I'd be surprised if they didn't have some refurb process for removing still-working parts of the mainboard and attached components. From a turnaround and customer experience perspective, it makes sense to just swap the part and do the diagnostic later so that you avoid having to guess-and-check through the multitude of parts that could be broken.