@Nadz777 Hi, What channel number have you've been using on the 5 GHz band? Have you tried a channel between 36 and 64 already?

@GregZaaa Perhaps the Powerline signal is already marginal at the locations you are seeing the disconnects and the slightest additional interference causes the connection to break up. Could you...

@TheRouterNoob https://static.tp-link.com/upload/firmware/2025/202509/20250905/Archer%20AX23(US)_V2_250814.zip P.S. Be reminded that once you have updated to a 1.1.x firmware, you will not be able to...

@Rooster98765123 Hi, It depends what sort of compatibility you have in mind. The D-Link E15 should work fine when used as a conventional range extender for your Archer router's Wi-Fi network....

@Polo224 Hi, Is "Archer AX1800" the exact model name as per the serial number label on the router's casing? If the Tether app doesn't work for some reason, then you can also configure the router via...

If there is suspicion that the problem might be due to the BE550 in particular, then perhaps perform a test with another old router you might have lying around or use a computer that has an Ethernet...