As title.. A mate of mine is having a few issues with his std Vectra C radio.
When either on radio or cd there is no display on the mfd. Plugs have been checked at the back and they are secure. The mfd does work as the dispay works when using the onboard computer from the stalks.

Any ideas guys?? Is it a goosed output on the radio its self??

Any info would be great peeps.

Thanks in advance.