My cloned box has been working fine for ages now I seem to have lost Sound pictures fine as just no sound I've tried adjusting the audio but no luck so was after some help.
If the sound loss is only on some channels;
Try the following:
Rescan the channels without sound. Make sure you set clear before scan on.
You can also restart your box.
With some images this is cured by restarting
If it is on all the channels, check the HDMI cable or scart.