You have made it much worse for me. I did what you suggested, and did the following:
Disconnected ethernet and power.
Held down reset and then inserted power cable.
After the flashing, power light came on
Set linux machine to add 192.168.1.2/24
Connected to router.
No connection at either 192.168.1.1 or 192.168.8.1 works
“Activation of network fails” message on my computer.

The router doesn’t do anything. Not Luci, not debrick.