Hi,

I've been using a 3-pack Deco P9 system in our stone house for about two years.  Recently one of the P9s developed a high-pitched noise which I read online was the result of a failing capacitor or choke coil inside.  Not feeling like fixing it, I instead bought a 3-pack of the new PX50, hoping to combine the two, the two good old P9s with a new PX50.  But upon installing them, I learned that the PLC backhaul systems were different (P9 uses HomePlug AV, while PX50 uses G.hn) and not compatible with each other. So I had to remove the old P9s and install the PX50s in each of my three rooms.

The problem is that the PX50 PLC backhaul is very unstable and often doesn't connect at all, while the P9 PLC was and is very stable and consistent.  I have ideal test conditions because I have units plugged into the exact same electrical outlets in the same rooms - the P9s are solidly locked into a constant PLC connection, while the PX50s rarely if ever connect over PLC, and when they don't connect, the Wifi backhaul is not strong enough to maintain the connection and the network falls apart.  As I mentioned, we live in a stone house, so the PLC backhaul is a critical component to the system.  I view all of these status updates via the Deco phone app.

So my questions are:

1) Any idea why the P9 PLC would be so stable, while the PX50 PLC would be so unstable, given that they are in exactly the same settings (physical locations and identical electrical outlets)? Is the new G.hn standard more delicate or fussy?

2) Is there any way to fix the PX50 PLC so that it works better (i.e. at least as well as the P9s)?