You may be seeing one or more of the greater than 2,000,000 dots (also known as pixels) that make up the composition of the LCD or OLED screens. These dots may appear red, green, blue, white, or black.
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In all LCD and OLED screens, there's a chance that a small number of pixels don't change color. This is normal for all LCD and OLED screens from all manufacturers. Most defects are noticeable only when an all-white or all-black picture shows. They shouldn't be noticeable under normal operation.
Because a defective pixel or pixels is normal on all LCD or OLED screens, there's a high chance that a replacement screen may also have them. It could have more defective pixels or the pixels may appear in a more noticeable position than on the one it replaced.
- Debris on the screen can appear as dead or defective pixels. Clean the screen thoroughly with a soft, dry cloth to confirm whether or not the issue is actually a defective pixel or due to just dirt or debris.
- Sometimes dead or defective pixels correct themselves over time.