After power outage Nighthawk X6s EX800 not work and all 8 lights are blinking

[Sammy28]

Hi,

Had a power outage and now Ac3000 extender not working.  I just get all 8 lights blinking simultaneously.  Any ideas?

Thanks

[plemans]

Start with a factory reset. 

Push and hold reset while powered on for 7-15 seconds. (sometimes up to 30)

If that doesn't work, the firmware might be corrupt. 

You can try recoving 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

and if that doesn't work, you can try using nmrpflash
https://github.com/jclehner/nmrpflash

[Sammy28]

I'll give it a try.  Many thanks!!!!

[plemans]

Good luck!

If you do try tftp/nmrpflash, its sensitive to timings and can sometimes take a few tries.