As mentioned befor with my dash it was the power supply board on the dash main board which was the problem.... Trying to post some pics for your viewing pleasure....
Leon...
I fixed my own dash...
Pic of power supply board...
Pic of where it come from...
Pic of corrosion of tracks and component legs.... (Middle of board you can see track corrosion)
Re solder and should be ok...
I hope this helps.....