Oh man that hurts. I have a mainboard and the stepper driver expansion boards mount the steppers oriented opposite to what is on the mainboard and then the pot is on different sides on the TMC2208 and LV8729 drivers and I installed 3 drivers backwards on the mainboard. I let the smoke out. Now the drivers are dead, with them removed the mainboard is dead. The screen is not turning on and I hope it is just because of the lost connection to the mainboard. So this job is on hold while I wait for a new mainboard and drivers. It stinks in my living room now. But hey, If your gonna be dumb and stupid, you gotta be tuff. I gotta go open a window.