

The MacBook Pro 2016s have not been out for very long, and our shop hasn't yet seen the damage that can be caused by under-powering a USB-C charging port. If the internal circuitry is damaged, you'll be in for a new logic board which can easily be $500 + labour, and Apple will not cover this as it will be considered "accidental damage". The first two issues are easy enough to fix you can replace the power adapter and the MagSafe board inside the computer for a (relatively) low amount of money.

Damage the internal power control circuitry on the logic board.Cause physical burn marks (scorching) on the MagSafe connector.When the MacBook tries to pull more power than the power adapter can supply, it will do one (or more) of three things: I and my co-workers have seen this occur multiple times. I am an Apple Certified Mac Technician working for an Apple Authorized Service Provider.
