Arris VIP5662W 4K Audio Problem

If none of it works, the last suggestion would be to get a new HDMI cable or have the box replaced.

Also, when you said you have an older version of the STB, do you know what software version you had? 

Thanks Kate,  I initally tried all those suggestions as part of troubleshooting as a cable or port problem would seem the likely point of failure. 

The same for swapping resolutions - to see if the problem was related to 4k alone and always the problem persisted until the optic box {singular -we only have one) was rebooted.

I have not seen the problem for a while,  mind you I am not watching more than a few hours a week of 4k content now, so it has either been addressed or is related to a memory leak and some other process is refreshing memory often enough I'm not seeing the problem. 

I do not know what the old software version was,  I had at the time just replaced the box for PVR issues so the box, hdmi cable etc were all brand new.

Again sorry for the late reply.  I have an anxiety disorder that affects memory and totally forgot about this.....