If you have a CK3100 and you are finding the display has gone blank (possibly still illuminating) and giving you ‘Bleeps’ when the ignition is switched on then there this is a sign of lost communication from the Blue junction box of the Parrot and the display, quite often this is caused by the display cable having a little ‘tug’ and slightly pulling apart a connector in the rear of the display. With a small flat screwdriver you can usually (Carefully) push the connector back together please see the picture below:
Ensure the White Connector is fully home.