I had the same issue, it started with one at first then progressed to 200+ lines of all the primary LED colours. I tried using the VGA out on an external monitor but noticed light static on dark areas of the screen. Another post mentions a uniform red square pattern. I got this too, and ripped the whole thing apart to find the heat sink cooling fins clogged with dust and the video chips discoloured. Sorry to tell you but by the time this happens it is too late, the on board video card has cooked itself to death. If you haven't experienced it yet, eventually the video card will crash your system and you will have no choice but to disable it and use a USB external video card and monitor.
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What is happening to your laptop is the power line connecting a row of pixels is failing so only partial colors are showing up causing the vertical line. Usually screen replacement is the only answer to fix it. You can usually find replacement LCD on Ebay.
Connect an external monitor to your laptop. If the problem appears only on the display of the laptop and not on the external monitor in the same time that means the video card is ok and the problem could be : the screen of the laptop or the invertor or the cable that attaches the screen to the mptherboard. If the problem appears on both screens, external and laptop, most probably the video card/motherboard is defective.
Have it checked/repaired by a professional.
Connect an external monitor to your laptop. If the problem appears only on the display of the laptop and not on the external monitor in the same time that means the video card is ok and the problem could be : the screen of the laptop or the invertor or the cable that attaches the screen to the mainboard. Have it checked by a professional.
what has happened with your notebook is a simple wear factor. on the LCD screen there are ribbon cables witch join the main PCB controller head to the LCD laminated portion (what you see) have begun to wear. i have just recently replaced a screen because of the same issue. try gently flexing the the screen and see if the lines dissappear. next open the screen up, and check the cable running to the back of the screen take care as to not damage anything.
Interesting that you counted them! If you haven't tried to reinstall the video drivers, do that. If that doesn't work, hook up an external monitor to see if the display is OK on that. If it is, then your LCD screen has a problem and will need to be replaced.
In answer to your question. It may be a screen problem. as the screen has a Matrix of vertical and horizontal line configuration.
I,d suggest trying the laptop/computer on an external monitor or screen. if it works fine on an external. then it could be assumed that the TFT Panel or invertor has a fault.
if the picture/display still has vertical lines on an external monitor, then the fault may lie, with the Mainboard.
Process of elimination, before spending any Money :)