@UHS123 Hello,
Sorry for the late update, if the House Leds are ON on power line units , you could try some suggestions here:
1> change a different Ethernet cable between Main router and main power line adapter
2> try a different LAN port on main router.
If still the same problem,please connect a computer to router by Ethernet cable ( same cable that main powerline adapter is using) and check do you have any Internet? Please send us a photo of the IP address on PC when wired to router.
How many Leds are ON on the main adapter (or powerline extender)?
If connected a computer to PA4010P extender by wire, what is the IP address & Gateway on your computer? https://www.tp-link.com/support/faq/838/