The appearance of PC screen lines is often a result of hardware or software problems. The most likely causes are faulty or loose display cables, wrong screen resolution settings, out-of-date graphics drivers, or problems with the graphics processing unit (GPU). It could also be due to internal display issues, such as a damaged ribbon cable or panel. These anomalies can be vertical or horizontal, and can be stationary or flicker, depending on the cause. Knowing if it’s a hardware or software issue is the first step towards a solution.
.
