AX-88U Pro suddenly offline?

[Mchuzie]

Running RT-AX88U Pro on 3.0.0.6.102_33320. Has run flawlessly for months until a day ago when, suddenly, it went offline for no apparent reason and no one is there to reboot.

Firmware auto update is off
Remote access is off
Modem confirmed operational

Do I have any options to reboot it remotely at this point?

What secure changes can I make to have the ability to reboot and avoid this predicament in the future?

Is there any way for me to investigate and determine the cause of this issue once it comes back online?

Thanks

 

[degrub]

Can you see the device in the device table of the ISP modem ?
If not, maybe power supply wall wart died. They do that sometimes.
Assume the modem and the router are both on a UPS on the battery backed up side ?

 

[Mchuzie]

Can you see the device in the device table of the ISP modem ?
If not, maybe power supply wall wart died. They do that sometimes.
Assume the modem and the router are both on a UPS on the battery backed up side ?

Actually these wind storms moving through reset the power and I'm back online. Neither modem nor router are on UPS.