As Didier says.
I also had this once when the 230V power cable came loose from the power supply. After that I made a clamp from steel wire, so that the power cable can never detach by itself. Never happened again.
Also, on the Ultimaker2 (I don't know about the plus), the little power connector at the back of the printer needs to *click* into place. Otherwise it is not inserted deep enough.
I would check these first.
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DidierKlein 729
Hi and welcome to the community
Simple question: is the power cable plugged correctly?
How do you start the printer again after a shutdown during printing?
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