If your screen works for a moment when you turn it on (showing the Lenovo logo) but then goes black, it's likely a Windows or driver issue.
If the shortcut doesn't work, a power cycle can clear "stuck" signals in your hardware. How Do I Fix Black Screen On My Lenovo Laptop
Here is a step-by-step guide to troubleshooting and fixing a Lenovo black screen. 1. The Magic Keyboard Shortcut If your screen works for a moment when
three times by turning the laptop off as soon as the logo appears. How Do I Fix Black Screen On My Lenovo Laptop