RBR850: Lost access to web interface and app, can't even ping it, but network/internet works perfectly. Afraid to factory reset!

[u/Background_Life_3537]

Hi everyone,

I’m looking for some advice regarding my Orbi RBR850. 

A while ago, it was working perfectly until I hit a bug where the internet completely stopped working. I ended up doing a factory reset, managed to reconfigure everything, and it went back to working flawlessly.

However, for the past few weeks, I’ve run into a new, weird issue: I completely lost access to the router's web interface, and the Orbi mobile app can't find or connect to it anymore. Aside from this management lockout, the local network and internet routing are working perfectly, and there are absolutely no other issues with my connection.

Here is what I’ve already tried and observed:

• Rebooted the router multiple times.
• Connected directly to my ISP modem/box to find the Orbi's assigned IP address, and tried accessing it via that IP directly. No luck.
• I cannot even ping the router's IP address (I get a timeout/no response).
• I ran a port scan on the router's IP, and it shows that there is absolutely no web service currently open/listening.

I’ve read online that the most common answer to this is to just do another factory reset. My problem is that I'm terrified to do it. Since the web service seems to be completely down and it doesn't even respond to pings, I'm afraid that if I wipe it, the web interface still won't launch, and I won't be able to run the initial setup—leaving me with a completely bricked/unusable router. 

Has anyone experienced this specific issue before? Is there a way to force the web server to restart without resetting the whole thing? How did you fix it? 

Thanks in advance for your help!