LCD/LED Monitor: 1. I have tried to restart my computer, but it is still there. yesterday, a fix horizontal green light has sudenly appeared on the screen of my HP notebook. I have a HP 250 G5 laptop and a single, thin, green, horizontal line has appeared across the middle of the screen. However, if you do see vertical lines on your laptop’s screen while you are in its BIOS, the problem … Since your laptop’s BIOS is technically not a part of its Operating System, if the problem is software-related, you will not see any vertical lines on your laptop’s screen while you are in the BIOS. I rarely see horizontal. By clicking on the Fix My Screen button, the website will display a fuzzy graphic on the screen that looks like moving static. On a white background the line is hardly noticeable but any other colour and its visible. If there are vertical or horizontal lines on the screen it could mean that the refresh rate on your display needs to be changed. I am looking for the cheapest way of fixing this (if possible) without replacing the actual screen. Try it with an external monitor to rule out the video card. Usually a green line would suggest there is an issue with the laptop ribbon cable or display adapter. Above is the screen shot of where the line located at. ... if you only get lines on the laptop display and not the external monitor you can rule out the graphics card/memory. This could also be indicator of an issue with the panel of the display. Question laptop screen problem: Laptop Tech Support: 0: May 10, 2020: Solved! So I bought a new screen and the problem seemed to be fixed. Check the video cables. The screen is also way dimmer than before. Once my computer loads and i can get to the screen where I type in my password it then freezes. I was connecting my laptop to a Smart TV Screen when a horizontal green line appeared on my laptop screen. To start give the screen a slight twist. Horizontal lines on the screen that show up even during POST or when the logo (HP) appears, could mean a defective LCD. Thus, resulting that line to appear on the screen. The Line is at the exact locaton, the top line of the Download Bar. This problem is caused by either a faulty graphics card or a loose video cable. Any ideas? Horizontal lines appeared over the screen making everything pretty much unreadable. At that point start wiggling the display, move it forward and backwards, see if the lines appear/disappear. No prior accident in my laptop happened. Not too hard to break the screen. Sometimes there is a loose connection and this is the result. Horizontal lines on laptop screen Vertical or horizontal lines running across the screen are very annoying, and they can make the screen unreadable. And when i do a print screen, it does not appear on the image. 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