Originally Posted by
gator69uf
It is an 18 month old Visio 47" LCD 240 Hz driven by a DirectTV box. There was absolutely no sound using either any AV or any HDMI input. I plugged the same AV cable into an audio amplifier and heard the sound fine. I have used the audio amplifier for sound for several days. This morning without changing any cables the TV sound began working again.
As to the intermittent HDMI inputs what I mean is that the picture and sound stopped working through HDMI #1 and I switched the cable to HDMI #2 and it worked. Some weeks later that stopped working and I switched the same cable back to HDMI #1 and it now works.
???
Try updating the software for the TV. To do this you will need to get the model number. This is usually found either on the back or the side of the TV. This usually fixes intermittent HDMI issues.
I know you said that the sound worked through your audio receiver, but also try a second device through the TV just to be certain.