How does a SLR camera shoot moving fonts on an electronic screen?

If it's not the monitor itself, but the monitor is complete, it's easy to solve only when taking pictures.

When shooting, we should focus on speed, slow down the shutter speed (for example, 1/60 seconds or 1/30 seconds), and it is best to use a tripod to complete the shooting. You can also adjust the shutter speed and try to increase or decrease it. This line should be caused by the unsynchronized flashing speed of LED and other areas.