New lead resolved sound issue but I have obviously done some unintentional alteration via the Control Panel as I now receive sound from e g BT Sport download but the picture on the second monitor is my wallpaper !! Help !!
Thanks Saltgrass - not sure how to do this !! On 8.1 any attempt to manage audio devices brings up Realtek screen showing "Properties" as "Realtek High Definition Audio" but no sound on 2nd monitor still. No mention of HDMI in control panel audio screens. Default shown as 24 bits 48000Hz