Why is there a blue line on the left side of the computer screen?

Yours may be a screen door. Just do a search. Replace the screen door directly during the free warranty period.

You can connect an external monitor, that is, connect the VGA port of the notebook. If the external monitors are the same, it is basically a graphics card. If the external monitor is normal, then the screen itself or the screen line is the most likely problem.

Volunteer to answer all kinds of notebook hardware problems, directly click on Baidu hi for online consultation and leave a message, or click on my personal information website for online QQ or telephone consultation.

Non-Beijing netizens can also ask questions. Forget it, hehe. You can find me in Beijing, and other cities can find reliable maintenance points for maintenance.