BTW, all other functions like wan, lan, wireless dhcp are work fine, the only problem is LED does lighting. I mean all of dashboard LEDs.

@woozle Hey, Thinks for reply me, I am no try any detault restore, just saw the web update firmware seccussfully, then reboot the router, after it back. I saw the passwd and user name was restored to...

@agengr hey, how about your router's LED status, my updates cuased all LED been turned off. any sugestions?

Today, I saw there is a new firmware archer_c9v1_us-up-ver3-17-1-P1[20210107-rel55552] for Archer C9 v1 (US). So updated it from my old stable version Archer C9(US)_V1_180125, update is seccussfully,...