My page down key is not working properly and I know it's not hardware problem

I had just recently installed on my old Dell Inspiron 11 3000 series pentium processor and everything worked fine, until one afternoon my screen started fickering while booting and the ^[[b characters started appearing on the screen. Then when i opened my pdfs to study, the page automatically started scrolling downwards. Not only this, when I went to the BIOS, same thing happened. I tried using external keyboard, but no avail. I know it has nothing to do with the hardware as it was fine in windows and zorin (before installing updates). CAN ANYONE HELP ME TACKLE THIS PROBLEM?

If this also occurs when entering the Bios, there is a high chance it is a hardware problem.

When you tried to use an external keyboard, what happened? Did it not work or did it work but the same problem occurred?

When I tried using the external keyboard, the same problem occurred.

This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.