My Macbook Air no longer recognises my Samsung display

Hi All - today i found my Macbook Air no longer detects my Samsung LCD display- model LS23A350 - i've tried plugging and un-plugging power sources and cables, even clicking 'detect displays' then connecting the mini DVI cable but to no avail.
Coincedentally it also no longer detects my Apple wireless keyboard but does the wireless Apple trackpad....
thanks for any help.

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Plug it back to the wall. Power the router on. Wait until all the lights are lit properly. It will take a while.
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Try System Preferences->Energy Saver:Automatic graphics switching (Deselect the checkbox).
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Message was edited by: themachead

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Please read this whole message before doing anything.
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My Macbook Air no longer recognises my Samsung display

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