@Eiranium How long is that cable you took from one of your Powerline adapters actually? In case you've left the Wi-Fi signals from the TalkTalk hub switched on, then you should place the AX1500...

@Eiranium Are you saying the (wireless) connection became unstable after you've moved the cable from the WAN port to one of the Ethernet ports?

@Eiranium Then that's the reason why the AX1500 doesn't obtain an IP address for its Internet connection. If you have the TalkTalk hub that looks like a book standing upright on its long side, then...

@Eiranium Hi, Have you connected the Archer AX1500's blue "WAN" port via cable to one of the LAN Ethernet ports of the TalkTalk router (or "hub")?

@DigitalVirtual Hi, I don't know what would fix the problem, but if your TL-WR841HP is indeed a "V5" with firmware version 0.9.1 2.0 from April 2018, then you might want to consider updating it to...

@bill-lancaster Hi, I recommend you download the user's manual for your particular AV600 model (check on the label of the adapter) and read about the meaning of the LED indicators. (below screenshot...