Orbi RBK752 with Netgear Nighthawk CM1200

Hi There,

I've been at this for several hours now, trying to fix this on my own, but having no luck. So the internet went out, and when I tried to check things, I discovered the Orbi states there is no internet connection. I hooked up an ethernet cable directly to my Nighthawk router, and there IS internet service coming through my router.  My Orbi, however, is not "seeing" it. 

I have gone through several troubleshooting steps, including powercycling both the modem and the Orbi, as well resetting the Orbi to factory defaults and reinstalling it, but no go. I have no idea why this happened - one second it was working fine, and now, it just doesn't recognize there is internet coming through my router. Currently, the light on the front is magenta colored.  I have also tried to update the firmware, but no luck with that either. I tried downloading the latest version from the website and manually uploading it, but all it says is "File error" and won't run it. (Currently, it's running 3.2.15.25, and I have 3.2.16.6 downloaded, but it will not install.)

I've finally managed to get the admin page to work again, and the odd things I've noticed are that the NTP settings have the date as "May 4" (funnily enough, my birthday), and it doesn't change even when I go from the default NTP to pool.ntp.org. Also, when I go to Advanced>Administration>Router Status the "Internet Port" section is just full of zeroes for the IP address, subnet, and DNS. (It IS set to get the IP address and such from the ISP, but again, it seems like it's not recognizing it's connected to the modem to get that information.)

I had posted this in another part of the forum, and they told me to repost here (I'd get better help), but one of the people asked if the LAG on my Nighthawk was enabled, and it is; and the ethernet cable from my Orbi is connected to the first slot on my modem.

It's been a cycle like this for hours no - rebooting, resetting, retrying, and I'm at a loss as to what to do next. I feel like I'm chasing my tail here. Any help would be appreciated.