My new Librem Mini v2 seems to be defective in some way, because I cannot boot PureOS 9 on it at all. I took an SSD with PureOS installed from a Librem 13v4 and put it right into the Librem Mini, but after decrypting the drive, it just goes to a black screen with a blinking cursor, and never gets to the login screen (even after waiting for 20 minutes).
I tried to reinstall PureOS, using the latest ISO from the website (202008), with/without swap/hibernate, and with/without full-disk encryption, but the login screen never shows up, and I don't see any error messages before getting to that black screen. I was able to install Debian 10, but I had an issue with the external bluetooth dongle; the bluetooth settings menu seemed frozen, and I couldn't select a device; again, this didn't happen with PureOS or Debian Buster on my Librem 13v4.
I'm also using a monitor, keyboard, and mouse all ordered from Purism, so I don't know how there could be any compatibility issues.