Hi there, I now have exactly the opposite question to "How to disconnect external monitor". I think it's the 2nd time that I get this so I believe that I must be doing something wrong and hence the question. Although I've been doing the exact same procedure over and over again and it seems to work just fine. The macbook was under sleep mode. I connected the power cable, then ethernet and monitor cable and finally a USB keyboard (I have a BT mouse). I hit some keys on the keyboard so that it would wake up and show up on the big screen but instead I got just a light blue background with nothing on it (seemed like the macbook was in a "extended monitor mode"). I tried pressing F7 to switch between the different modes but nothing happened. I even tried opening the lid but the display was blank. I noticed that when opening the lid, the white light in-front of the macbook would turn off. I even tried disconnecting it from the monitor plus the power cord but to no avail. Finally I had to hold down the power switch to make it shutdown and power up again. So again, what's the proper way of doing it? PS. As you can understand this is my first mac so excuse me if my questions sound silly.