hi, dsl to contradict but in reality on the T9 + the hashboards are as follows:
Chain 1 = 2 - 9 -10
Chain 2 = 3 - 11 -12
Chain 3 = 4 - 13 - 14
As you tried to change the white cable of the hashboard, and the problem is to move, I believe that the problem comes from the cable ... try to clean it well
Finally, do not install firmware as suggested, I offer it FREE !!! simple advice, why pay: D?
as very well explained above, you must run a firmware before 2019, if this is not the case, you must downgrade by SDcard.
Here is the procedure if its tells you:
1: Install the latest original firmware before 2019, here it is:
https://easyupload.io/p44ue62: install my mod (by update firmware on web gui) to unlock the functions, here it is:
https://easyupload.io/u6utr5Enjoy! start with 650mhz and 830mv, you will have a better hashrate AND a clear drop in consumption;) and heat! (ps: 650mhz is stock frequency for this chips, same at S9)