For 2010-2017 model Macbook Airs, there are two USB ports. The left one is run off the DC in board, the right one is directly on the logic board. Oftentimes, the left side port can stop working as a result of a bad DC in cable or bad DC in board. Replacing these will solve the problem. If the right side USB port is not working, then you most likely have a logic board issue.
For Unibody Macbook Pros from 2008-2012, if a USB port is not working, it is typically a logic board issue – the ports are directly on the board. It can be an issue with the USB power delivery chip, or a USB hub chip – see below for examples. In rare cases it can be a dead MCP(the modern version of northbridge or southbridge) or PCH(platform controller hub, the modern MCP), at which point you are in for an unpleasant repair. Most of the time, you are dealing with an issue around the power delivery system.
Basic DC in board problem: $75-$150 on the Macbook Airs, depending on whether it is DC in board, cable, or both.
Right I/O board problem: $200-$250 for the right I/O board depending on model.
Logic board repair: $200-$425 depending on the model and how bad it is. Liquid damage tends to cost more than non-liquid damage, and newer models tend to be more complicated than older models when it comes to USB issues.
We do all of these laptop repairs in-house, with parts in stock. Watch us do the work below: no outsourcing!
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