Black screen during startup

[Optimus]

I was receiving a blue screen when waking up my computer so I shut it down and upon restart there was a black screen and nothing would appear. After a while the password box appeared but I couldn't click on it finally I was able to open with password entry. What may the problem be?

 

[Trouble]

I was receiving a blue screen when waking up my computer

Blue Screens are usually accompanied with an error code.
Here's a list of items that might help
http://answers.microsoft.com/en-us/...p-errors/324d5a5f-d658-456c-bb82-b1201f735683
Additionally down near the bottom there is also some mention of

upon restart there was a black screen and nothing would appear