Occasionally when I reboot Unraid (shutdown via webui) it failed to bring up the webui. It normally works after a reboot (power off is immediate so I know unraid hasnt booted). Today it hasnt come up at all. I eventually plugged in a monitor and it is stuck at a solid "-" in the top left hand side. It seems to have loaded some graphics drivers though because it did resize the screen so it's not right in the corner as it started off. Hard drives are chirping away but nothing is happening. Any ideas?

and now when I turned it on it's fine and the WebUI is up.