This is an installation of CentOS 6.3 in VirtualBox 4.2. I was able to install with no problems and have booted it up about 3-4 times previously and used it without any issues. Now, when I start it, loads the bar at the bottom of the screen, but then stops here:
then after about 5 minutes the screen goes completely blank. If I press a key it then switches back to the screen above. It never took this long to boot before.
I am not able to get to any prompt or anything, so it seems like I probably have to do a fresh installation. But I'd rather not if there is anything else to try.