DMP2000 suddenly turns off

[eto]

My DMP2000 seems to have an issue: While printing, it suddenly turns off. All LEDs are off and it stops working. I also can't just turn it on again. I have to wait for a couple of minutes then I can turn it on again - and it then also prints again for a few minutes.

my guess would be that it has something to do with the power supply... but that's a topic I have absolutely no experience with. Any suggestion what to check first and how to proceed?

thx