Hello I was using kongs build on my R9000 and all was well until my router rebooted and I realized it was hard bricked. I tried 30/30/30 with no luck tftp didn't work ether. I'm stumped on what could be going on.
https://kb.netgear.com/22688/How-to-upload-firmware-to-a-NETGEAR-router-...
This link helped me.
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https://kb.netgear.com/22688/How-to-upload-firmware-to-a-NETGEAR-router-...
This link helped me.