Hi Again Westwood
You have the wrong adapter. :(
It MUST be input HDMI and Output SCART (RGB) and it must have an external Power supply. A new one price will be less than 50£ properly 30£ Some are offered very cheap but they are HDMI to SCART (CVBS=Composite video signal)
Then it will work, and if properly setup you will get a fantastic picture and sound in Dolby Digital. The BV 5 is a fantastic TV both with sound and with the Plasma Screen.
Many BV 5 owners are using that solution.
I have one question, does your BV have 5 RCA plug (Phono Sockets) in the at the rear together with the Dolby module and the three Scart sockets. ?
Brgds/Fritz