Problem adding additional ECB6200
Several months ago I had purchased the 2 pack of ECB6200's to add ethernet to a room off of my garage where I had difficulty getting a decent wifi signal. That has been up and running with no issues.
I recently decided to add additional devices so that I could stream via MoCA to a couple of TV's instead of via wifi so I purchased another 2 pack from Amazon, installed them, powered them up and within a couple of minutes, all 4 ECB6200's had the COAX light lit.
My problems started when I plugged my laptop into the ECB6200 ethernet port at one of the new locations, not only couldn't I get an internet connection, the device that had been connected and working for months also lost it's internet connection. I disconnected everything and started over but had the same result.
Next, I went back to the original setup which had been working and had no issues so I decided to try one of the new location with only that device and the one connected at the Spectrum router and that also worked, however as soon as I added another ECB6200 and plugged a device into the ethernet port, everything lost internet access.
I'm looking for suggestions on what to try next. I have verified that all 4 ECB6200's are running the same firmware revision.