HTPC through AV Receiver - loss of audio

Hi all, new member and first time posting.

I have an issue where I will watch NetFlix or an AVI file on my TV and I will lose audio. I do a troubleshoot and it fixes the issue but when I restart it happens all over again. The output device is correct when I run the troubleshooter (AMD HD5850 HDMI). Has anyone come across this issue and knows a potential long term Fix?

All drivers are up to date

HTPC
Gigabyte H55M-S2H m/b
I7 860 cpu
4gb ram
Windows 10 Pro
AMD HD5850 gpu

Yamaha AV Receiver RX-V463 5.1

 

Is this the first time you've connected it to the TV or something that has just started to be a problem?

 

It has happened intermittently. there was no problem before when i went direct to tv via HDMI but now i run through receiver it plays up randomly.

 

Try a different HDMI cable? You don't need a gold plated one or anything like that.

 

cheers mate will give that a crack

 

I'd be looking at the receiver connections and settings.
One other thing would be trying to isolate the audio output from the HDMI by sending it over optical or an alternative connection?