It looks like a lot of people are having Arc disconnect problems. If you have a streaming device hooked up, a CEC blocker will fix the problem. The blocker device has to be in-line with the offending peripheral, as far as I know. I don’t think putting a CEC blocker in line with a cable or satellite box will work.
If you are getting disconnects without a streamer in place, then it’s a real mystery to me. Since an Amazon Fire Cube is the culprit on my Samsung NEO, a CEC blocker stopped the disconnect. Interestingly a Roku Express doesn’t cause the problem. I think, therefore, it is incumbent on Amazon or Sonos to tix this bug.
DH
This is the first I’m seeing this solution about a CEC blocker, and it seems logical to me, the AppleTV we use is likely the culprit. My Arc disconnects almost daily, and I have to unplug everything and run the TV Setup option from the Sonos app, which is a pain for a wall mounted TV.
There’s only one HDMI cable routed from my TV to the storage cabinet, so I use an HDMI switch for all of our devices (other than the ARC, which is directly connected to the TV).
If I use the CEC blocker, I’m worried that will interfere with the automatic switching of the HDMI switch, unless I put it on the output of the switch?
Thanks!