Did my r7000 brick overnight?

We woke up to find all of our smart devices non-responsive. Here's the details I currently have on the issue: 

-router has been setup as an AP, with DHCP auto addressing 
-my router (OPNsense) shows the DHCP lease for the device, lists IP (eg. 192.168.1.13)
-I can ping the device at 192.168.1.13

Troubleshooting
-during power up, with no other devices connected, I see the usual breif flashes of 8 or so lights. After about 15 sec, the power LED lights steady orange.  This lasts about 90 sec.  Then light changes to solid white. 
-I've attempted to reset the router to factory defaults, but see no response from the router no matter how long I hold the button.  I do feel the affirmative click when pressing.  I have also tried the 30-30-30 timing suggested elsewhere. 
-I can tell that the device remains in AP mode, because connecting to the typical LAN port does not provide DHCP resolution or response to pings. When I connect via the WAN port, the device again appears in DHCP leases of my router and responds to pings at 192.168.1.13
-I've attempted to transfer the latest firmware via TFTP, with the following command:
tftp -192.168.1.13 put R7000-Vblahblah.chk
which returns:
tftp: don't know host '-10.0.12.13' 


I'm starting to get the feeling that this guy is bricked, but I thought I'd pick some brains here first.  This router's getting kinda old, so I won't be too heartbroken.  But I do generally like to use things until they break, where possible.  
Any thoughts?