So - Pull> first power plug and plug (5 minutes) after a long time, the display will light up (Innobella icon). Now the On / Off Press and hold - the result that the device error "forgets" and continues to ramp up; even running the previously failed print. Then enter the date and time and you're done!
If you are not holding the start button moves the device back to the error in and turns off - an endless circle.
I hope finds its way back to the usual quality Brother. By 4510 their buyers have rather disappointed especially since 5910 are often to be had for half the price of this equipment. Only the small dimensions speak for the device - nothing else!