If it is no sound in Drivemob Pro or other apps do this:
All Sound Setup BASICS
1. Power cycle your box. Do this by unplugging in the Power, Then plugging back in.
2. Make sure the Volume on your Box Remote is turned All the way up to Max.
3. Make sure the Volume on your TV is turned all the way up to Max.
4. If you are Watching Movies or Shows, Try Changing the Link, Or Play with the VLC player instead
5. If you are watching Live TV, Change the Channel and see if you have sound there. If you do, report the channel that has no sound on Discord.
6. Try Chaning your HDMI cable, and also Use a different HDMI input on your TV.
7. No Audio or sound is 99% of the time App related, or TV related. We have never seen a faulty box cause this issue.