I consider myself pretty adept at using forums having done so for more than 20 years. However, if you feel that I have in some way not followed the rules of this particular group then I apologise. In this instance, I have fitted a replacement like for like screen to a Navigon 4NSF and the new screen is only displaying a white screen when powered on. I was simply wondering if this is because it needs some sort of configuration or reset on the the unit. I don't understand how this type of screen works , so was asking for assistance. What sort of further information/photographs do you feel would be useful ? I am happy to provide as much information as needed. Thanks in advance.