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Asus RT-AX86U and RT-AX86S seem to freeze after a week or so.

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I originally had the 86S as my main router running Merlin firmware with an AX3000 as a wired ai mesh node running stock firmware. After a week or so, I would lose both wireless and wired connectivity (devices would show no connection and the SSID was not visible). I was unable to access the router in any way (wired or wireless) and was forced to power down the router to get connectivity back. I figured since it was a refurbished device, you get what you pay for and replaced it with the 86U. After a week or so, the 86U (also running Merlin firmware) did the same thing. I thought maybe it was a glitch in the firmware (I know not likely but was trying to eliminate possible causes) so I reinstalled the stock firmware. Again, the issue persisted. The modem shows connected the whole time. I've looked through the settings and nothing jumped out at me as far as a possible cause. Any ideas what could be causing this?

I had a similar issue with my RT-AX68, ended up RMAing it and they gave me a a replacement unit as it was a hardware issue. This was in Taiwan though, so I could just walk in to one of their service centers there.

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