I am terrified that my barely one-year old, out of warranty, MBP is broken! Basically, when I try to power it on, the screen simply does not turn on. I know the computer is working because if I press Caps Lock it lights up, and when I hit the different sound levels the clicking noise is made. The dimmer does nothing. Has anyone ever experienced this. Why will my screen simply not turn on? My mac is not attached to anything and has all the latest updates. Please help!