BeagleBone freezes on boot


I am not quite sure where to ask this question, so I will start here.

I have the BeagleBone revision five and have played around with the demo image of Debian from 5. february. I now want to update, but I am having troubles getting the board to boot properly. For all the later versions of both Debian, the boot process hangs after INIT has started, with a message saying that task startpar has hung for more than 120 seconds. With Ubutunu, I get all the way to the loging prompt, however, no input is accepted from my keyboard. I use the serial port to communicate with the Beaglebone.

Has anyone experienced this or know how to fix it?