Now that's interesting. I really can't imagine what might cause that. Could you be a bit clearer on what is happening?
When there is no second monitor attached and start the laptop, do you get any screens at all before it goes dark? Make sure that your laptop is NOT hibernating but is doing a full cold boot.
If you do get some BIOS screens OK then I would say it's simply a settings issue. You have assigned the other screen as the main screen in the driver software.
When there is no second monitor attached and start the laptop couldn't boot and/or access the widow.
Note: I waited for several minutes,up to 4-5 minutes until the windows finish the start up, then I tried to shut down it but do not (press window key and 1 right arrow key then enter). do not get any screen at all before and not hibernating, I tried to turn off/on monitor (press key FN and F6) .