My MacBook had Snow Leopard. I was trying to remove Windows 7 to make more space available. When I thought I had successfully removed Windows 7, I powered off the laptop and when I turned it back on, I have a black screen that says
non-system disk press any key to reboot.
I have pressed a key and nothing happens. I've tried Control+R to bring up the recovery system and it brings be back to this screen. I've tried X which is supposed to force OS X to open and I get back to the black screen. I've tried holding down the Option button and it shows the Windows 7 option. Even after selecting that, I'm brought back to the black screen.
I don't have my Snow Leopard disc any longer and I just don't know what to do at this point.