Vertical lines of dead pixels on laptop screen

I carry my laptop around everywhere, and more and more lines of dead pixels have been appearing. Is there a way I can get rid of them? And is there a way to prevent them from happening?

It sounds like there may be damage to the display driver circuit board - this is typically a small circuit board that resides somewhere behind the screen itself (often at the bottom), or the connection between this board and the display panel… It is possible for people to replace this for themselves, but I really don’t recommend it, as it’s fiddly and the risk of doing more damage than good is quite high.

I’d get it repaired under manufacturer warranty (if still unexpired), or get a quote from a laptop repair shop - if the quote comes to more than half the price of a new laptop, cut your losses and get a new one (sell the old one on Ebay for parts)