2008 C5 X7 screen and CD unit not working

[pelopelirrojo]

After some advice please.

My car went in to a garage after the alternator failed. Everything else was working fine.

Picked it up with new alternator fitted and the CD/radio unit and sat nav screen are all dead. Which also means the parking sensors don't work either as they use the sat nav screen too.

Garage suggested a fuse. So I checked F8 in fuse box C in the glovebox, a 20A which is ok.

Any ideas as to what has happened to cause this?

[pelopelirrojo]

Panic over. Pulling the fuse to check it has reset the unit.
Everything is back on now.