Filement feeder motor

I swapt thermosensor of extruder 2 into extruder 1.
Everything lookt fine. Heating up to 210 degree, printerhead is moving but there comes no PLA out.
The motor which should feed the filament is not working

If you are using a computer is there any error information in the log area?
If you are using an SD card is there any information on the LCD?
In your other post you said that you used the latest version of the Arduino.
If you have not done it yet reload the firmware using Arduino version 1.0.6 or older.
Do not use anything higher.
You can download it from this link.
https://www.arduino.cc/en/Main/OldSoftwareReleases#previous

I loaded the the filament 1.5 cm in the tube and pushed th knob to load the PLA filament in the right extruder. nothing happens
Even pushing the filament until the extruder will not help.
I can print a model from the SD card. The extruder heats up to 210 degree. and the printer starts moving as is if it was printing.

I have tried now the second printhead and same happens.
heating extruder2 and the notice on the LCD feeding filament. After a while with noting happening, the printer returns in start position and the LCD shows :Vertex ready, and the themperture of the printhead cools down

I found out that the driver boards of extruders failed . By swapping the driver board of the extruder driver board with the Z-drive driver board, the Z-drive did not work. With both exruder drive board.
I made a mistake with my last action. I wanted to print only 1 layer so I didn’t need the Z-drive. Obvious i replace the drive board not in the right position ( 2 pins outside ). The mainbord gave a spark and smoke and died.
Now I need 3 new driver boards (VM8400M) and a new mainboard.
I don’t know if there is a garanty on the DIY set.
How do I get new parts?