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Orbi Wifi 6 RBK753S shows blinking red (firmware corrupted)
Router RBK753S stopped working with a blinking red led seems firmware corrupted Tried these - Reset by pressing reset switch - Update firmware through tftp - failed as it seems it cannot connect...
You can try recovering it with tftp or nmrpflash.
are you on windows? if so, follow this guide
https://kb.netgear.com/000059634/How-to-upload-firmware-to-a-NETGEAR-router-using-Windows-TFTP
just make sure you enable tftp
https://www.thewindowsclub.com/enable-tftp-windows-10
and here's a video walk through using a tftp client. Use the built in one for windows 10 though. the video is more of an example of how its done.
https://www.youtube.com/watch?v=R9DLrLQrpaw
Tttp can be sensitive to timings so try a few times.
and if that doesn't work, you can try using nmrpflash
https://github.com/jclehner/nmrpflash