After assembly only rectangles in LCD
I assembled the MMU step by step with the online manual.
After finishing is startet the MK2s and there are only rectangles in the LCD Menu, nothing happens.
When I Power off the printer, the Prusa Sign appears shortly and "saving files" and it turned off. Nothing more.
I tried to update firmware, but there is an time out error in the software.
What can i do?
Is this a good question?