@FC83 Hi, welcome to the community. Usually, Deco should connect to the nearest Mesh units for a strong Mesh connection, but a chain layout would add one more network hop, and it could add more...

@Kvicken Hi, how long have you held the reset button? Usually, it should be only 1s. You can swap the power adapter with another Deco, then power restart it again, then hold the reset button for 1s....

@diggidydale Hi, welcome to the community. I'm afraid not. HX510 doesn't support Deco Mesh and can't be added to the Deco APP. HX510 would work as a regular Wi-Fi router, and the first main Deco M5...

@Magnus_Rivus Hi, thank you very much for the details. I'll escalate your case to the senior engineer first for further assistance. Please check whether you can receive my email later. Best regards.

@summoned Hi, I'm definitely sure that when Deco is in AP mode, both can be connected to the main router via Ethernet cables, which is one of the common scenarios for Deco Ethernet Backhaul: General...

@Devotee101 Hi, Have you replaced a new Ethernet cable to connect the main Deco to the ISP modem? It is also suggested to connect the ISP modem to another Ethernet port of the main Deco. Please...