MGmikey

Hi.
I wonder if anyone knows the answer.
I have a very annoying intermittent fault. Every so often, the sound goes on the stereo. Stays lit but just no sound. When you turn the engine off and you are meant to get the audible tones, they don't sound either. I've changed the stereo thinking that was at fault, plus the wiring loom at the back of the stereo.
Still a problem. Any ideas as this has got me baffled.