healer

When you plug in the external monitor, does it display the mirror image of your desktop all on its own, without you having to do anything? If so, try the following:

If your laptop has a Function (Fn) Key on the bottom left-hand side of the keyboard (it usually sits next to the left Ctrl key and most laptops have them) then you should have a corresponding video output switching key. Look for a picture of a monitor/screen on your F8 or F4 key (F8 is the most common in my experience).

Now press Fn+F8. This should switch the external monitor off. Go to the display settings and right-click on the '2' in the window and click attached. This should enable the Extend my desktop check box and as soon as you click apply the external monitor should come on as an extended desktop.

Hope this works.

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