Corsa-B.uk - Vauxhall, Opel and Holden Corsa B Owners Club

I have a rather strange problem with the radio/time display. It works ok in daylight, but when you turn on the headlights (or parking lights) it goes blank! What could the matter be?

Might be that brightness control wheel thing below headlight switch

I checked that and it's all the way up

If its turned down it wud be dull when lights go on not switch it it cud be the connection has moved un the back of the mfd