Simplify3D User Forum

I was using the little wire brush to clean off my nozzle and I saw a spark, heard a click and now the control screen is black and the machine seems dead. Light on the power switch is still lit. All fans stopped spinning.
Any thoughts about what short-circuited?

Using a wire brush around the nozzle could do one of three things.

Short the heater supply out
Short the thermocouple out
Connect power from the heater supply to the thermocouple

Any of these has the capability of damaging the controller board. And there might even be a fuse somewhere that you've blown.