Yes I replaced the 4 pin JDAB cable. I did it with a generic cable off amazon but I don't see that making any difference vs using the polk branded cable. The original polk cable in there seems to be in fine condition. I got rid of the Y splitter and wired the linc directly to the polk unit, no difference.
I have read people having issues with the polk unit, mine seems to be fine and has no issues with bluetooth.
Linc version is 2011030.2.7.10466/ 3EMY2015
Application - 2.7.10219
OS 2.7.20021
Bootloader 2.7.20045
Config 2.3.15030
I don't think the firmware has been upgraded, when you click on the stereo button on the linc screen it displays the polk logo.
Thanks for any help. The closest dealer is 3 hours away, not looking for a long trip just for the stereo.