Hi lectron, thanks for the reply. I'm powering the board via the dedicated power adapter cable that came with it, and I'm using my Apple Laptop to power the board, so I think that should be providing enough current.
I've tried the Lubuntu image, and that doesn't work, but instead of endlessly looping, the system manages to boot into the built-in Android install. The onboard Android distribution works fine, although it's in Chinese so I find navigating the system tricky.