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Did you ever figure this out?I have a AT4 XL and NONE of my USB or HDMI ports in the rear work at all
I know this is an old post but hoping you still check this site! I'm having the same issue. I'm curious. Were you also getting an SD Card Removed error at this time? I get that on every startup and coincidentally I also have "broken" usb c/hdmi ports in the rear console and front console. My problem may be related to a wiring issue, I'm guessing all of those ports including the SD card reader are part of the same harness. Wondered if that same failed part number might be causing a break in the loop and creating all those issues.Sorry, misunderstood you. The part number is 84803140.