If your computer won't display video, here's how to troubleshoot it. Please keep in mind that although your computer may display similar symptoms that prevent it from turning on, this article discusses what to do if the computer won't display video, meaning that when you press the power button: You may hear a startup chime You may hear fan or drive noise You may see the power light on the computer light up If your computer does not turn on, when you press the power button: You won't hear a startup chime You won't hear any fan or drive
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