no sound over HDMI

[Mr Edd]

Not sure if this applies in your OS, but in Windows you right click on the speaker icon at bottom right taskbar. and the context menu pops up with options to select the device default for playback. If this is available on your system then select HDMI as your default speakers. Or if you just want that for watching whatever then don't make it the default and just select for that one time. Of course you will have to do this manually each time. This is of course if you can find this feature on your OS.

HTH

Edd