I have a 40" Samsung LCD HDTV - 1080p. I am aware that the Macbook is not made to output to such a large, high res display. However, when I use the mini-DVI to VGA adapter and, obviously, a VGA cable into my tv I get some weird results. (I have tried using DVI-HDMI but I have nonstop compatibility issues with the tv, so thats out of the question, VGA works fine and is good enough quality for me) When using the tv as a second monitor, it works without fault, as long as my Macbook is open and awake. However, when I shut my Macbook, the weird stuff starts to happen. First of all, I have the computer set to allow bluetooth devices to wake it up. When I close the lid and the computer goes to sleep, I click the mouse and move it around and most of the time it will not wake up no matter what I do. It is very temperamental. When it finally does wake up it works, using my tv as the main, and only display, for about 25 seconds, then the computer goes back to sleep. On occasion it will enter a cycle of waking up and going to sleep all on its own. The computer is babied night and day and has no other issues whatsoever. I called AppleCare about this and for the first time I was disappointed when calling them. They told me that the Macbook is not meant to be used in this fashion, closed using an external monitor, and that's why I have issues. I am not satisfied with this response. It's a friggin' notebook computer. Why does it have the option to be awoken by a bluetooth mouse if it's not meant to be used in this way. If you have any information that could help me figure out why it does this and maybe your own experiences of using your Macbook closed with an external monitor I would be greatly appreciative.