There have been many reports on here (use the search box) about similar faults on Megane & Scenic cars - variously Cluster and Dash
My own opinion is that the issue is caused by a poor inspection routine after flow soldering - poorly made joints made worse by vibration over time - but that's just a guess.
Somebody was offering a repair and return service and there are reports of the high cost of a repair by main dealers.
Other people ask how to remove the dashboard.
Good Luck...
April 2016