I have an ASUS Chromebox (CN62), and I'd like to enter developer mode so that I'm able to install other Linux distros, following instructions here: https://www.chromium.org/chromium-os/developer-information-for-chrome-os-devices/asus-chromebox#TOC-Developer-Mode
I've connected the keyboard to the Chromebox via USB, but nothing happens when I press Ctrl + D on the Recovery Screen.
If I boot into ChromeOS as usual, the keyboard works normally.
It looks like the keyboard was the issue. I was able to enter developer mode using a wired keyboard