CRS312-4C+8XG-RM Slow Speed / can’t change to SWOs

Support responded to me and told me to install v6.48.1. I did that, saw the reboot option to SwOS, selected it, and rebooted.

Now the device is stuck in what appears to be a bootloop.

  • All the lights on all ports turn on and blink for ~3 seconds.
  • Fault light (red) turns on briefly
  • Port lights turn off for ~10 seconds. Power light remains on.
  • Repeat, forever

The device no longer appears in WinBox at all, I can’t ping it, and it’s completely inaccessible. So now I’ve got a loud paperweight. Ugh.

Maybe it’s got an old version of SwOS on it? But fixing that would probably require me getting back into RouterOS, which I can’t do because I’m stuck in a bootloop. Is this something where I should do a factory reset by holding the reset button while powering on? Did I do something wrong when upgrading? (I grabbed both the main + extra RouterOS packages from the download page)