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To Attach another screen to your Laptop all you need is a LCD / CRT / TV Screen or projector.
How to Attach it is same method like you attach your Monitor to Desktop Computer. Do you know how to attach your Monitor to Desktop Computer?
If after you attach your Monitor and you doesn't get any Visual that means you need to press keyboard shortcut to External Monitor. Please see your manual to find out what button that you need to press.
If you still get any visual on you Monitor. Do you hear any sound like Windows Welcome Sound?