Take out the battery and disconnect the power cable. Press power button for at least 1 minute.This will remove any static power from the pc. After this just connect the power cable and see if display comes on. In case still there is no display, try bootinto safe mode with VGA display. If the display is there, thenn you need to uninstall video drivers in that and restart the computer. If still no dissplay, then the vido card might have gone bad,
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