First off, this is fantastic information and I appreciate your expertise.
My “noticing” is related to the display only. I only see the bed rising by 2-3 degrees before the error shuts it down, which I don’t know if my fingertips would be sensitive enough to notice, but I will give it a shot.
I followed the destructions that came with the machine and they are pretty clearly labelled. They also, only plug in one way based on the “channel” on the plug. That said, the “heat” cable was quite tight to reach from the printing head housing to the motherboard. I made some adjustments to create a little more slack, but without dismantling the hot end housing (the cooling fan) I cannot see how it is seeded.
I will try to feel my way through the heat up process and report back. Thanks again.