I own a dell xps 15 9570 and sometimes experience that my laptop isn't booting up on pressing the power button. although, after pressing the power button for an elongated period of time, the laptop's fan speed sound becomes noticeable and then it boots up. My laptop is still in warranty but there are no issues in my laptop which i realized after running various recommended tests. Please help me find a possible reason behind this and a sustainable solution for the same. thank you