@iamshaky This should work just fine. Connect switch to one of available ports of Satellite Deco, and connect Playstation to switch to test that it works. It should. Then, plug everything else to...

@HarmH To address the remote possibility of hardware issues with one of Decos, can you run two more tests: 1) Disable 2.4GHz in Deco app WiFi setup for Main Network (and for Guest Network if it is...

@HarmH Have you checked to which Deco each of Decos is connected, and what is signal strength of their connections? If I to guess, one of the possibilities could be Deco on the second floor is...

@weteamsteve I wonder if you maybe having two different WiFi networks with same SSID and different passwords. One from Deco mesh, another from elsewhere. Your Main Deco is connected to ISP router...

@Rahmat.A I can also explain logic behind guidelines. For initial Deco setup, you need to connect Deco to working home network. Your unifi router provides working home network, so this is where Deco...

@Rahmat.A There is no harm in trying. Just follow what is said on page 5, make sure you power off Deco and old router before disconnecting them, and power on Deco after it is connected to modem. If...