Same poblem here. I know this isn't an answer, but it worked for me. I got one on those metal dental tools for scraping tarter or plaque off your teeth. Cleaned out all around the pins on the port on the bottom of my s8. Way down deep. I powered off before just in case. I had a big magnifying glass and could see lint or something in there. Blew it out with canned air. Now connects and fast charging on all cords, all chargers, including the vehicle. I hope this helps. ... View more