How to Enter in Asus E402S Laptop Bios

If you can't Enter the system, please try to press and hold the Power button about 5~8 seconds until the Notebook is shut down. Press and hold the F2 button , then click the power button. DO NOT RELEASE the F2 button until the BIOS screen display

You can refer to the video
https://www.youtube.com/watch?v=NbnPWhI4xis&feature=youtu.be