Macbook stuck on black screen
Hello,
I recently tried to install Windows 7 onto my macbook, but it didn't work due to bootcamp not able to partition the hdd. I removed the Windows cd then started my macbook. I heard the chime but nothing after. Then it goes to a black screen shortly after with a flashing underscore in the top left corner. I tried all sorts of solutions like holding down option, and all the other key combinations but nothing. I haven't opened up the computer so it shouldn't be a hardware issue. Please help ASAP. I also tried putting in my snowleopard usb to see if it wouold boot from it, but it won't. Just straight to a black screen.
MacBook, Mac OS X (10.6.8)