Ultimaker 3 keeps resetting itself when i use support from 2nd head

[RudydG 36]

When i start a dual head job (so with 2 cores), my printer keeps resetting itself.

First it heats its platform, then it starts heating core1, and after about 2 seconds it totaly resets itself, display and all the heaters out, and then a message on the screen that the print went wrong....

First i thought that it was software related, but it also happens when i do the X-Y offset calibration.

 

What steps i already did:

 

-Replaced the 2 cores.

-Factory reset and calibrated the Z 

-Took the printer apart to check if there was somewhere a cable or connection problem (and cleaned everything 😉

-replaced Usb stick

-print with only core 1 > ok

 

What else could i possibly do? 

 

Is there a hard reset possible? Should i bring my printer to the dealer?

 

 

 

 

 

[RudydG 36]

Power supply was the culprit, new one, and everything is working again!