I have a Samsung Note 9 with a weird technical issue that has to do with usb standards. If I plug in the phone to a PC using a USB-C to USB-C cable, the phone will charge and transfer data to the PC. If I use a USB-C to USB-A with the PC, the phone will give me slow charging warnings (much slower than the 500mah) and the PC will not see the phone.
If I use the Samsung charger block with a USB-A that comes with the phone, I will get very slow charging again. I guess there is a handshake issue with the usb a standard.
So basically I can ONLY use USB-C to USB-C cables to charge and transfer data. I'm wondering what could possibly cause this since I have tried saftware reset and changing cables and the phone charger port. The only thing it could be is the motherboard but why would the USB-C to USB-C cable work!?
Did some digging and I have a lead that it could be the OTG circuits on the mobo. I got PCB diagrams and repair guids. https://www.alisaler.com/samsung-schematics-diagram-download/ This website has a all the documentation on many Samsung phones