Jochen,

Yeah the sound still comes from my TV tuner perfect. So you don't reckon it is wiring? Does the MKIV use the same audio out pins as the TV tuner?

The only other thing I can think of is a corrupt Nav Disc? Can you explore the disc and navigate to where the Nav speech files are and play them through windows?

I have V29 of software I think, I will update to 31 later and see what that does?

Is there anyway the MKIV I have bought could be broken? As everything else works great with it?

Terry