Tuesday, October 14, 2025

macbook professional – USB3.0 to USB C cable does not work when plugged straight into USB C port, however does work when linked via hub

The USB change violates the USB specification by utilizing USB-A ports as inputs, and by doing this they’re placing prone to injury something linked to those ports. There isn’t any fixing this, not in any manner that makes any monetary sense. The change was constructed damaged by not enjoying by the quite simple guidelines set out within the USB spec.

Unplug every thing from this change and by no means connect one other system once more. This can be a fireplace hazard. Connecting USB-A to USB-A is mostly dangerous. There are some exceptions to this rule however none of them contain connecting a pc to a USB change.

The issue is the change and the cables that got here with it. They took a budget path than the right one. Now you may have cables and units that would doubtlessly trigger injury to your electronics if not used fastidiously.

Once more, there are instances the place USB-A ports can be utilized safely for inputs however these are uncommon they usually by no means switch energy. Energy is to to circulation out of USB-A ports, by no means circulation in. USB-A jacks or plugs are to sink energy, by no means to produce it. If there’s two units supplying energy by USB-A getting linked to one another then likelihood are excessive that everlasting injury wall occur to 1 or each units.

The perfect repair right here is to be rid of the out-of-spec USB change and begin over. Attempting to get this damaged piece of equipment working as meant goes to be extra bother than it’s price.

Edit so as to add: USB units will both supply energy or they are going to sink energy, they by no means sync energy. USB will synch knowledge, as in “synchronize” that knowledge however not “sink” knowledge, except the intent is to destroy it. To ship energy or power out is to be a supplyand to the the one receiving that power or energy is to be the the sink. If there may be doubt on the terminology than consult with the USB specification or keep away from any written commentary on the matter.

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