Yesterday I entered a public transport while traveling for the Christmas holiday.
My laptop was in my travelling bag and the screen worked fine before I left for the park.
On getting to my travelling location I discovered this green lines on my laptop screen.
But my I changed from dark mode to light mode.. the green lines reduced
Please any idea what's wrong?

this is graphics or video card display issues. uninstall and reinstall the graphics driver or update the driver. restart the system.

Adewale1603:
this is graphics or video card display issues. uninstall and reinstall the graphics driver or update the driver. restart the system.

I restarted the system it's still the same thing.. how do I uninstall and reinstall the graphics driver?

Luukasz:

I restarted the system it's still the same thing.. how do I uninstall and reinstall the graphics driver?

I'm surprised you are asking this question. Well not everyone who owns a laptop is a Pro. I'm not castigating you because I'm not a Pro too.

The answer you seek is in the Control Panel. You can seek the help of the Gurus on here.

Luukasz:

I restarted the system it's still the same thing.. how do I uninstall and reinstall the graphics driver?

while being connected to the internet, you will go to your PC settings, search for device manager, under device managers, you will click on and expand the icon for the display driver and right click on it and click on update driver.