i have a 9200t with a video sender connected to the vcr out on the pvr box but while i can get a video signal i can`t get audio form the pvr from this socket, tried the sender with another freeview box (pioneer dbr-tf100) and this works fine, any suggestions!. thanks.

Not really got an answer except to try the video sender with the TV SCART socket of the 9200 and see if this works Ok. Might give a clue.

Picture but no sound is often caused by a SCART plug not being plugged in fully or possibly a faulty lead., but in this case I think you have already eliminated that possibility.