Why is my monitor grainy? - EPN epn.org/why-is-my-monitor-grainyPrivate View Understanding the causes of a grainy monitor can help you identify the issue and find a suitable solution. So, let’s delve into the possible reasons why your monitor might appear grainy. 1. Display Resolution. The first thing to check is the display resolution. A low display resolution can make images and text appear grainy or pixelated.