Desperate

Hi.

I'm new to the forum and 3d printing. I've had my printer a while now, probably about six months (Anycubic Prusa I3 Ultrabase Acrylic). My latest issue has got me completely stumped. My extruder and part cooling fan are coming on when i switch the printer on and stay on. I have no control of them through the slicer S3d or Gcode terminal (M107) for example. I have updated to Marlin 1.1.8, I've also tried 1.1.9 and reinstalled the original Hex file. The problem remains the same.
I've Googled, Youtubed, Facebooked and tried everything to sort this to no avail. Can someone please help.

Jim

This sounds like a dead mosfets,

but I am suspicious of your firmware, if the pins are wrong... It could act the same.

what controller does it comes with and what motherboard type did you set in configuration.h?