This article explains how to turn on an HP laptop and what to do if the laptop won't turn on.
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The most common way to turn on an HP laptop is to press the power button. Depending on your specific laptop, the power button will be located in slightly different places. Some have it on the side, some on one of the corners at the back, while others have it just above the keyboard on the bottom half of the laptop.
If your laptop is not completely powered off, you can wake it from sleep mode by opening the lid or pressing any key.
If you need help locating the power button on your laptop, please refer to the manufacturer's manual or visit the HP Customer Support page for documentation.