Can't find the power button on my new HP Pavilion laptop

which pavilion is it? on the normal clamshell ones the power button is usually just a key on the keyboard itself, top right, with the circle-and-line symbol on it, so it looks like any other key. the x360 convertibles put it on the side edge instead so it still works folded into tablet mode. if you've found it and nothing happens, plug the charger in first. a lot of new laptops leave the factory in a shipping mode and won't power on from battery the very first time.