Geeetech

I think the problem begins from the hardware.
I moved the printer to another room and the difference now is from left to right.

The images is not mine but i have exactly the same problem It is impossible to start a printing with auto level. During printing the nose in the front side of heatbed is too close to surface and in the back side the gap is very big and the filament do not stuck at the surface With manual leveling th...

Suddenly my PWM fan is always rotating.
I have changed the fan but the problem remain.
I suppose the mosfet is broken .
I have a Arduino Uno board, can i use it with the pins from the second extruder that is not in use to control the fan speed ?

Thanks all for the informations! I also "successfully managed to get this board back to life" with Arduino UNO as ISP. In the code described the pins position. // This sketch turns the Arduino into a AVRISP // using the following arduino pins: // // pin name: not-mega : // slave reset: 10 : // MOSI:...