I got a USB->TTL serial adaptor and hooked it up to see what, if anything, was happening.
At first it didn’t boot, saying that it couldn’t find any partitions. On the second go it did boot, but it outputs no HDMI. Imagine my surprise when I found that I could log in via the serial TTS via Putty.
I thought maybe I could use xrandr to force a display resolution, that it might be trying to output something my monitor can’t do, but this idea did not work.
Can’t open display
I think my unit is defective. What do I do now?