@Drongo Thanks for your reply. Try to change the DNS server of the main router. Primary DNS to 8.8.8.8, secondary DNS as 8.8.4.4. After that, please verify whether the LED light of Deco turns to...

@ Badge234 Thanks for your suggestion, have noted that.

@Holgerportugal Below is the onemesh compatibility list, as you can see, the Deco is not here. https:// https://www.tp-link.com/onemesh/compatibility/ So in other word, the Deco and Onemesh devices...

@thefunkygibbon Replied to you on your another thread.

@thefunkygibbon Have you ever updated the firmware to 1.3.1 of the Deco M5; after that, do you still have the same issue. Please draw me the current network diagram, including the switch. Besides,...

@spicy61 After you setup the TD-W9970 as pure modem and Deco E4 as main router, how do you connect these devices together? Try to remove the powerline network and the switch to test the performance...