Black screen with blinking under dash
I was attempting to install windows 7 onto my macbook pro when one of the installation processess "expanding files" seemed to have froze (stayed at 0% for a good 25 mins), so I then tried cancelling the entire installation, but that also decided to take forever. So being the impatient bafoon that I am, I forced shutdown by holding down the power button. Upon start up, I initially get a blank white screen with no apple logo and a transition into a black screen with a blinking underdash on the top left corner (the type that shows you where you are currently typing). After long periods of waiting to see if anything else will happen and a number of restarts, it insists on staying on this black screen :/
Any suggestions as to how I might go about fixing this problem? Thanks in advance!
MacBook Pro, Mac OS X (10.7.2)