Home made 3D printer, extruder motor not working

First of all, sorry for the bothering and if this issue was already reported somewhere, and somehow slipped trough my search in the web!

So, I got a 3D printer home made and the extruder motor doesn't work. I've done several things, but somehow cannot find what is going on.

I am using arduino mega 2560 with ramps 1.4 with 4 motors (1X, 1Y, 2Z and 1E). All works good except E motor...

Searched for the issue in the net, saw a lot of people with the same issue, but none of their solutions worked for me...

So, what I have done:

Downgraded from Marlin 2.0.9.1 to 2.0.8.2 (issue persisted)
Disconnected the motor and connected it to the X drive (when enabling X drive, the motor works --> motor ok)
Disconnected the servo board and swapped it with the X axis (it works --> servo drive ok)
Disabled cold extrusion protection --> did not work
Tried to extrude only when the bed and hotend reach temperature setpoint (also didnt worked)
All the other drives functionalities are working as intended.

My configuration.h looks like:

[files.fm]

Run the ramps hardware test sketch [reprap.org]

This moves all stepper motors and toggles all mosfets (make sure to have heaters disconnected as there is no temperature control, and no filament in the extruder)

If E doesn't move with this, you have a hardware issue

Edited 3 time(s). Last edit at 09/23/2021 04:34AM by Dust.

ok

Edited 2 time(s). Last edit at 10/14/2021 08:08AM by siha49.