CAX30S stopped responding after reboot

[ju66er]

My Nighthawk CAX30 was getting slow speeds yesterday so I unplugged and rebooted it. After that I couldn't connect to it at all. Tried the app but the device wasn't found. I tried various ethernet cables but the router couldn't be accessed either. I called Spectrum and they said everything was fine on their end. Searched for answers on this site and they had a firmware update that came out two days ago for this specific problem but there is absolutely no way of updating since it is not being detected by the app or directly through my desktop. I tried with a laptop and same result...nothing. I've had to connect my old Netgear C6220 modem/router to get back online.

[FURRYe38]

Please post a copy and paste of the modems connection status page.
Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box. 
Be sure your using good quality RG6 coax cable up to the modem. 
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Mod...
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router?article=24311
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html

Factory reset the modem and setup from scratch with a wired PC and web browser...

[ju66er]

All of the above have been done. I was on the phone with my ISP multiple times trying to troubleshoot this device. Once again, I cannot access the unit so I can't post a status page of any sort. The connection works fine using my older Netgear modem/router, so it's not my ISP. Factory reset does nothing. I tried resetting, unplugging it for up to 10 minutes, used different ethernet cables. On my browser i have tried routerlogin.com, routerlogin.net, 192.168.0.1, 192.168.1.1 but I cannot connect the the router interface at all. I have owned many Netgear routers so I'm familiar with troubleshooting and so far nothing I know is working. 

[FURRYe38]

You'll need to Contact NG support and see what your options are:

https://my.netgear.com/support/contact.aspx

Ask about an RMA.

Good Luck.