Dell laptop starts but screen is blank?

So I left my laptop running over my bed and when I came back its like the screen is turned off. Pressing keys on keyboard made no difference so force shut down using power button and started again but the screen won't turn on. Keyboard lights are turning on so I think laptop starts but screen won't... show more So I left my laptop running over my bed and when I came back its like the screen is turned off. Pressing keys on keyboard made no difference so force shut down using power button and started again but the screen won't turn on. Keyboard lights are turning on so I think laptop starts but screen won't start.
Is it something like on PC when ram gets dust and monitor won't start if so can I do something without actually opening the laptop myself.
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