Take out the battery. Press power button for a minute. Then put battery back in again and power up. Repeat couple of times if necessary.

Try changing the boot mode to legacy boot instead of UEFI boot.

Remove the battery. Then press the power button for a minute. Then pop the battery back in. Hope this helps.

This is a LCD screen problem. It sounds like dead pixels. Look on Wikihow on how to fix dead pixels. Best of luck!

Go into the Bios. This can be accessed by pressing the F2 key. I would repeatedly press it after powering up the laptop. Once you have reached the bios, change the bios mode. Then try booting again by restarting. If the reset has failed, you can reinstall windows from a USB. But you may need to backup your files which in turn can be a hassle. If you do have to do this (hope not), then connect it to another desktop computer, and give full permissions for individual folders and backup your files. Contact Microsoft via live chat on how to reinstall windows via USB. Your windows key will be installed on the bios, so it wont go. It can be accessed later via a product key finder tool.