Troubleshoot pixel noise on display

Photo Examples

Video examples

this video gives an example (https://www.youtube.com/watch?v=nTGG1NiF2MY) with red pixels

Appearance

• This manifests as certain pixels lighting up and flickering

• Even if the input signal isn't changing you may see the pixels rapidly flicker

• Usually it will be a single color. It very often happens with the GREEN component of a pixel. But can happen with RED (LESS COMMON) or BLUE (UNCOMMON).

• You may notice that the pixels light up in vertical or horizontal stripes

• This problem is not related to "STUCK PIXELS". In this case which pixels light up is dynamic and depends on what is shown on the display.

Sources of the problem

• The ultimate source of the problem can be:

  • The display panel

  • The cabling (cables & ports)

  • The GPU that is sending the display signal

Cabling

• This problem seems to be associated with the connection to the display and is often a cabling issue:

  • Sometimes the cable is bad

  • Sometimes the cable is sagging or stretched too tightly and can cause this problem as it puts pressure on the ports

  • Sometimes it is due to the ports the cable is using

  • It can occur with HDMI, DisplayPort, and USB-C cables/ports

Try

• Using different cables

• Use a different port

• Use a different kind of port (for example, switch from HDMI to Displayport)

• Test with another computer

• Checking the refresh rate

• Test with a lower resolution

• If you are unable to resolve, you should contact your manufacturer's support