(Sending this as email to the support email address as well.)
For whatever reason, my Quick Set page switched from Home AP to CPE after I made some changes. I liked what that page looked like in Home AP mode so I backed up my config and switched it back.
Not sure if this is relevant, but I had just upgraded the firmware (System → Routerboard) from 3.27 to 3.29 a few hours earlier.
So anyway, after I switched back to Home AP, the router would no longer ping and the WiFi SSID no longer showed up.
Then I did the “system reset” procedure by holding down the button for 5 seconds after powering it up. Still no luck.
I wiresharked port 2 and noticed no traffic except CDP (MNDP?) from the port. I had another MikroTik router on the same subnet so I went to it and saw the Neighbor entry for the bad one, it was very minimal. But MAC telnet worked! Sort of. It got jumbled up, so I found source online for a program called mactelnet so I built it and used it instead to log into the “bad” router.
When I did “export” there was nothing there. When I did “export detail” there were a few things, but it looked like most of the config, even the default config, was wiped out.
I put my config back on it and it’s working now. Luckily I had just backed it up!
What happened?