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Each of the USB-C ports needs a controller and if any of the four have an issue the computer will not charge.
by xvf22 8y ago
Each of the USB-C ports needs a controller and if any of the four have an issue the computer will not charge.
- saagarjha 8y agoI believe MacBook Pro has two Thunderbolt controllers, one for each side.
- adrianN 8y agoOne of the USB-C ports on my work laptop recently failed but the machine still charged from the other one.
- Jdam 8y agoThe USB controller is unrelated to USB power supply.
- xvf22 8y agoWas going by this [1] which seems to show that if one of the charging ICs goes bad it can cause the rest not to work. This is probably one of many failure mechanisms. [1] https://youtube.com/watch?v=MY8LlHfK9ZA https://youtube.com/watch?v=MY8LlHfK9ZA