printer Smoking ☹

Hei there

I finished building a ratrig vcpre 3 500.

Now i am at installing it.
I did flash Rat OS to sd card of raspberry pi and turned on the printer to be able to connect to RatOS.
No sd card in Octopus v1.1 as of now!

While i was setzing up the wifi the printer started to smoke like crazy.
The hotend heater just heated like crazy without stopping!