Nighthawk CAX80 won't save configuration data.

[Ming58]

I purchased a Nighthawk CAX80 cable modem/router a little over 2 months ago. 

Netgear support is absolutely useless. The CAX80 will not save the configuration data.

I cannot change the ipaddress for the LAN because when I reboot it doesn't save the configurations. 

Supports answer was "Its a cable modem and you can't change the ipaddress".  My answer "it doesn't save any configuration data. 

After a month of wasted time, they agreed they needed to replace the CAX80. Now comes another month of support asking the same questions over and over. Try this try that. I tell them just replace it like was promised. Supports answer "I not authorized to do that." (I didn't mistype that either) Still waiting for replacement but keep getting emails asking me to send them a date and time I'm available to talk about it. No response on the dates and times I send them. 

Every time this ##CAX80Nighthawk reboots I have to reconfigure it. The app makes it harder to do, so I uninstalled it.

Anyone else having this type of problem?

Hw V 1.01

Fw V 2.1.5.2

Cable Fw 1.02.08

[FURRYe38]

What browser are you using? 

Does this happen with MS Edge or FireFox or Opera browsers?

[Ming58]

I have tried Edge and Firefox. Same result. Tried using the Android app and got the same result. When the router is rebooted it displays it has not been configured yet and I have to go thru the entire process again. I saved a config backup to simplify things a bit. 

[FURRYe38]

Something to try, reload the same FW version on to the modem with a wired PC. 

https://kb.netgear.com/23960/How-do-I-manually-update-the-firmware-on-my-NETGEAR-router

After it's back to ready, reset the modem and setup from scratch using the erase button:

https://kb.netgear.com/24233/How-do-I-erase-the-configuration-settings-on-my-Nighthawk-router

Be sure to clear out all browser caches.

Then walk thru the setup routine with same wired PC and web browser. Set up the system for your needs. 

https://kb.netgear.com/22697/How-do-I-install-my-NETGEAR-router-using-the-router-web-interface
Recommend setting the default DHCP IP address pool range to the following after applying and a factory reset: 192.168.#.100 to 192.168.#.200.
https://kb.netgear.com/24089/How-do-I-specify-the-pool-of-IP-addresses-assigned-by-my-Nighthawk-rout...

Then save off a back up configuration to file soon after all has been setup:

https://kb.netgear.com/24231/How-do-I-back-up-the-router-configuration-settings-on-my-Nighthawk-rout...

Let us know if you can get this completed. 

[Ming58]

I'll give it a go but I originally did all of the configuration with a wired PC. I don't trust WIFI for that kind of work.

Wiped and factory reset it before the second configuration. But I didn't consider any browser caches. 

[FURRYe38]

Same here, wired is preferred for this.