If your Macintosh computer won't turn on, here's how to troubleshoot it. Please keep in mind that although your computer may display similar symptoms that prevent it from showing video, this article discusses what to do if the computer won't turn on, meaning that when you press the power button: You don't hear a startup chime You don't hear any fan or drive noise The power button or power indicator doesn't light up at all If your computer doesn't display any video, it may display one or more of these similar symptoms when you press the power button: You may
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