So I dropped my 12 inch 1.33 GHz ibook and broke the display. The screen is still usable, but it won't show certain colors and there are horizontal lines that travel from the top to the bottom. Needless to say, it gets very annoying and is an eyestrain. Therefore, I would like to buy an external monitor and was wondering if buying a larger (like 19 inch) monitor would work, since it has only a 12 inch screen? Do I have to use the spanning hack? Also, is there a way to turn off or disable the ibook screen when using an external monitor? Thanks much.