I sourced from a donor board. It was a PD controller I had laying around with other chips I had previously pulled, so unable to verify if it was from the same model or position. New type of fault for me. Never seen something like this before to be honest. Seen similar cases where the mac won't enter DFU because of a bad PD but it will charge etc... But not something like this...

Hi Mon,

I have just replaced the PD controller and the USB C port is now working! So it seemed to be PD controller related... Maybe a communication issue with the PD controller? Didn't look bad underneath? Maybe could have reused the same chip...

Al good now though. Thanks for you help though. Really appreciated!

Thanks for the help again! Yeah, I started to think this could just be a problematic PD controller or possible TBT ROM. Would it be possible for it to be caused by a TBT ROM? Or is that unlikely? I think I might end up just replacing the PD controller and see if that changes anything. Unfortunately, I need to get this job finished even if its not a fix. So won't be able to hold off until tool arrives. I will report back if this changes anything. I have seen similar things where people have not been able to enter DFU mode on an m1 mbp but the pd controller itself works just fine in terms of charging....

Hi there,

Thanks again for responding. So the current draw on the bad port will climb slowly, as if it is working. So it will start at like 5v0.3 and then go to like 0.7, then 1.3, then 2.3 and then it will just drop to 0amp draw and sit like that. The other port works just fine. The mac also works just fine and when logged in, when using the bad port it displays as a charging symbol, but will specific that the battery is not charging correctly. Tried another usb c port as well in case, but still no difference... New charger etc...

I have just ordered one of those tools...

Hey bud,

Thank you for responding so quickly to this. Yeah, I have tried cleaning out the FPC connector. This is the 13 inch m1 so only one set of usb c ports on one side. FPC connector very clean. I have check continuity from CCX pins to the test pads as well and it all seems good. A very weird one really...

Got a bit of a strange one here. Issue is that the mac powers on and charges just fine in one of the ports. When you plug the cable into the other, it will sit at 5v but still draw 2.3 amps, just like the 20v port.

Board is just like brand new, no liquid damage or anything. Has been swapped into a new housing previously though by another shop. Was given to the customer and they brought it back to them saying it wasn't charging correctly.

Checked board measurements. I have also tried the charger flipped both ways for the CCX pins, but still makes no difference.
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