I have a Creality Upgrade Ender 3 Pro V4.2.7 Silent Motherboard with TMC2225 Driver and trying to install a BTT TFT35 E V3.
Made the boot sc with
This loaded OK on TFT
which is appears to be blank.
The screen comes up with all the options but is displaying No Printer Attached
if I move to the emulating screen it works OK
The black cable, where should that go on the motherboard, and what way round as the is no guide slots
I have the same problem except that i did the update as you did but I am getting an error saying out-of-date data, and can no longer use it in either mode. Did you find out how to install on the silent motherboard