@TL81, we’re having what might be a similar issue, but in our case I believe I’ve tracked down the lack of audio to the problem with the video playback - it appears as though we’re getting no sound because the “Vero 2” is desperately trying to sync. it with video which is playing back badly (jerkily, even when visually it appears relatively smooth).
For example, I’ve stuck “Frozen 3D” on in the background as a test - currently about 44 minutes in and have only had a few seconds of sound (from the bl**dy ice miners singing at the start … 
).
Obviously it’s just a guess that your problem might be related, but it may be worth considering …
If you’re interested, my post on our problem is here (consistently interrupted playback) - hopefully it might be of some help, though of course YMMV …
Cheers,
Tris.