If your laptop screen is cracked or broken, the only way to repair it is to replace the screen and restart the laptop. To do this, you should first close the laptop and then reopen it. You can also try to peel off any stuck pixels. Additionally, you should check the screen and backlight connections.
Before replacing the screen, you should make sure that the other parts of the laptop are working properly. To do this, you can connect it to an external monitor or television. If it works normally, you can focus on replacing the screen. If your manufacturer's warranty is still valid, you should take advantage of it and get a suitable replacement screen for free.
If you have never replaced a laptop screen before, it is best to leave it in the hands of a professional to avoid any potential damage. The process and complexity of replacing a laptop screen vary depending on the manufacturer and model. Therefore, when an important component like the screen breaks and your laptop stops working, it can be very expensive to fix.