UPDATE: My Toshiba satellite L750D/L755D laptop will not boot up.?

Okay so here is an update of the question I just asked. My laptop now - instead of loading and saying Booster CD and Cable Connection it now does nothing. I just turned on my laptop and the Toshiba logo appears and about 3 seconds after that it says 'Windows is now loading/starting up' with a white rectangular box underneath it. It loads, then a black screen comes up with just the mouse. It continually stays blank. I have been on the Toshiba website and the one thing that sounds like it could work- my laptop decides to do this. Please help.