Problems with the sound not in sync with picture and sound cutting out entirely

[Diane787]

Lately the sound on some channels is out of sync to the picture. We also lose sound on channels as well. If we switch channel and then go back, the sound is restored. Anyone know why and how do we fix it. This only happens on the TV connected to the PVR box

[NFtoBC]

I suggest unplugging the PVR for a few minutes and restarting it. At least that addressed a similar problem for me.