I can't get any sound when I use the Amazon Prime app on my nowtv smart box. All the other apps, including iPlayer and YouTube and Netflix work fine. I have three now TV smart boxes in the house and the other two are fine. I cannot work out what the problem could be.
@Anonymous User
Have you tried to delete and reinstall the app?
You could also try to unplug the device and router for a few minutes.
I'll give those a try thanks