Iam using VGA to DVI to the Dell monitor but I am getting thick vertical line on the right side of the screen. Have a U2715 monitor (the 3 year warranty expired on February 12, 2020) which I have been using for 4 years in graphic and product design field.Yet had a problem with a vertical yellow line on left 2/3 of the screen recently. However, it doesn’t anymore. On my new monitor these faint vertical lines became progressively more noticeable in games. However, it doesn't anymore. One goes to the port of your screen, and the other to the port in the motherboard. Replace the Ribbon Cable. Its just my user wanted bigger screen so I changed the monitor but now giving black vertical line. good day all, my viao laptop developed multiple vertical lines all over the screen after I did a restore settings on the syste: Dynamic vertical lines on laptop screen: Gateway NV57H26u vertical lines on LCD but works fine on external monitor: Vertical coloured lines? As mentioned above, the vertical lines on monitor can be related to the incorrect video cable connection. I had to move the monitor too far away from my eyes, and pull down the brightness alot in order to hide them. You can also try to replace the ribbon cable. Sometimes lines on monitor may be related to the ribbon cable that connects your laptop’s screen to its motherboard.  This monitor works on different computers. These monitors used a technology called CRT or cathode ray tube which is a fancy name for a picture tube. I have a Dell S2240L monitor. Initially, it went away on its own or sometimes a gentle press on the screen made it go away. You … One day, a vertical red line appeared on the monitor as shown in the picture. The image below shows a blue line appearing randomly on my HP Spectre x360. However, if the lines disappear, then you should replace the monitor. One day, a vertical red line appeared on the monitor as shown in the picture. Unlike a desktop computer’s monitor, a laptop’s screen is actually a part of its body, which is why this problem can be the root of quite a lot of grief. To fix the vertical blue lines, you need to find the root cause of it. If you have a laptop, you need to open its faceplate and access the screen. On my old monitor everything is clear and crisp irrelevant to what colour displayed. At first I thought the lines were part of the web page, but when I closed the browser they were still there. Black vertical bars blocking the sides of the screen are an indication of an incorrectly configured graphics card. Dont know if it is driver issue. Initially, it went away on its own or sometimes a gentle press on the screen made it go away. It was working fine until I clicked a link to read an article on the Huffington Post one morning, then I noticed 4 vertical lines on the screen. On self diagnosis, all colors seem to be working good, except white screen has the yellow line and blue screen has a black vertical line at the same position. Laptop fails to recover from Sleep mode, weird vertical lines appear on monitor. When this tube reaches the end of its life, a white line shows across the screen. To fix this issue, you can reconnect the video cable to the screen and check if the lines are gone. I have a Dell S2240L monitor. Vertical lines running through your computer monitor can be disrupting during use: they can often be removed by properly configuring the computer and making sure the connection doesn't have any problems. This eventually drove me to return the monitor to the store. It’s time for an upgrade. Then you can tinker around the screen to see if you can find the problem. If they do not, you have a faulty LCD panel that will need to be replaced. Vertical lines on your laptop’s screen can either be caused by a software problem or a hardware problem. 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