I have successfully managed to install 2 moCA adapter in my house, one in the kitchen near the router and another in the master bedroom.
These two work well and I can get internet connection in the bedroom.
I got another adapter for another room and the moCA light comes on but I can see only the adapter from the master bedroom and not the one in the kitchen( tested by assigning each adapter a static address and pinging each one from a laptop connected via ethernet to the adapter).
What could be the problem? If I disconnect the master bedroom adapter and leave only the kitchen and other room on I get no moCA light