[ebarker]

After looking at the pictures my issue is still with the ribbon cable. There was a batch of bad cables last year and the rework instructions on just not viable. It takes a proper crimp tool to make ribbon cable and an proper cable tester to make sure it is done correctly.

You can continue to chase other theories and fiddle with the ribbon cable while you wait on a new one to arrive but I would definitely get a new cable asap.


Statistically the most likely failures on the control chain is the software followed by the ribbon cable, followed by reversed PWM cables, IMHO.