Hello. I started another thread in the basics and help section asking for advice on formatting a new hdd and cloning my present one. This is the thread: http://forums.macrumors.com/showthread.php?t=332384 I have another problem and posted on here as this section is moving faster than the other. After, I booted from the external and after around 10 min of only the desktop background showing the screen went black! I don't know what happened. Can someone help me? Is there a way for me to boot from the hdd in the mb again or is it damaged?