Krups EA9010 hangs in the Hello Screen!

Hello
,I have replaced the electronics in my EA9010, everything connected properly and checked several times. The machine hangs in the Hello screen and can no longer be switched off. Also the attempts to get into the service menus fail (neither English nor French).
The old circuit board works, but the power section for the grinder is defective, therefore the exchange.
The two boards behave very differently, although everything is identical except for the date of manufacture, including the version number.
Does anyone have any advice? Do I have to initialize the new board somehow?
Thank you for any advice and best regards!Krups Espresseria Automatic EA 9010

Update: the version numbers are slightly different. It seems that the display software and the motherboard software are not compatible.
I now get a different version of the mainboard.
That it can come here with the EA9010 to such effects was not known to me although of course conceivable.
LG