I've got an older CK3 Pro, not sure of the Rev but it has a plastic serial port and tried using the update cable for update the NAND-X. I got the autobaud error so then I added the wire hoping that would fix it and but to no avail same issue. I'm not sure what happened but the NAND-X is not showing up in device manager (one red LED) and it is getting rather hot while connected for even a short amount of time. If anyone has any clue what the issue may be please chime in so I can finally use my Cool Runners. Thank you in advance.