Normally I work on pcs, not macs so I'm not real sure of my options but I'm trying to help a girl out.
She has two MBP, a late model 2013 (8GB Ram) and a late model 2015 (16GB Ram). The 2013 has a bad speaker and the keyboard has a few keys that no longer type but otherwise is in perfectly fine working order. She uses a wireless keyboard which she says "...is cumbersome to travel with."
The 2015 has seen better days, the case has more dents and dings than a golf ball and is acting up (powers off, the cooling fan is LOUD, battery only lasts 45 minutes, and missing a few screws from the bottom of the case so the touchpad doesn't always recognize taps, and there are two lines going horizontal on the retina display).
She wants to know if the processor, ram, and keyboard from the 2015 could be moved to the 2013 laptop or would the performance be marginal between these two systems?