Prusa I3 ramps E0 doesn't give signal to extruder 1

Good day and Merry Christmas!

I am currently working on my awesome Prusa I3, however I am troubleshooting with my extruder.

here's what's up!, my extruder stepper motor isnt receiving signal from E0.

Info about my printer:
It is fully assembled and I have propperly installed Marlin firmware
A while ago when i was checking my axis when the Y Endstop had made contact with the frame and it shortwired my circuit.

Shortly after shitting myself i came to the conclusion something must have been broken.
I did a checkup and realised my extruder steppermoter didnt receive any signal.
The Arduino Mega 2560 still uploads the firmware so i believed my ramps must be broken.

Here i am now with newly bought ramps and still my extruder stepper motor isnt receiving signal from E0.

Tested:
pololu shields all work.
all 5 motors still run when put on current.


Maybe:
Arduino Mega is broken, but i dont know how to test this.

I am only using 1 extruder and the 1.4 ramps can have 2, is it possible i put my only extruder on E1 with some adjustments within marlin?

If there are other solutions to this problem please help

Big thanks!
Bauke

There is a prevention for cold extrusion in marlin.

//this prevents dangerous Extruder moves, i.e. if the temperature is under the limit
//can be software-disabled for whatever purposes by
#define PREVENT_DANGEROUS_EXTRUDE
//if PREVENT_DANGEROUS_EXTRUDE is on, you can still disable (uncomment) very long bits of extrusion separately.
#define PREVENT_LENGTHY_EXTRUDE

#define EXTRUDE_MINTEMP 170
#define EXTRUDE_MAXLENGTH (X_MAX_LENGTH+Y_MAX_LENGTH) //prevent extrusion of very large distances.

Your hotend temperature must be higher.

Ha! thank you very much! one step further to Printing