Hello Thomas,

please turn off the printer for 10 minutes and restart the printer.

Please reset the factory settings using these  instructions  . and update the  firmware .

Then check if the problem persists.

If necessary, the printer must be replaced.

Please let me know if your concern has been resolved or if you have any further questions on this topic.

I would also be happy if you let me have your Service TAG as a PN so that I can document your request.

LG Martin