Yeah the screen works etc and can see sat nav etc, all works and buttons bleep.
I did the Bluetooth module disconnection and made the two MOST cables point at each other, it was successful in the effort of bypassing the Bluetooth but there was still no audio.
I waggled and messed with the TMC radio receiver box, and saw the MOST red light beaming into it, however checked at the amp side and noticed there was no signal being sent into the amp, so I am guessing this unit is goosed; I have ordered a replacement, however I also tried the bypassing technique on this section, and managed to disconnect the TMC, keeping the infrared cable looped, it all worked etc back to how it was, aka no audio…
…really running out of ideas as to what it could be!