Hi there @mel71,
Welcome to our Community and thanks so much for your first post - I was sorry to understand that you're having some issues with your sound on your new TV box. Do you find that this happens on all channels?
We've not been able to locate your account from your forum information, I am sorry about that; have you rebooted since seeing the issue to see if that helps settle things down and reconnect the box with the Hub; how are things since your last post?
If your old box is no longer registered on your account with us as an active equipment, you will no longer be able to use this to watch TV or use nay of the functionality of the box. Please feel free to pop back if you're still having issues and we can do what we can to assist you further
Cheers