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Common Screen Problems and What Causes Them
A plain-language map of typical display faults, from stuck pixels to flicker and burn-in, with general causes and which ones are cosmetic or functional.
Foundations
Care and Common Problems
Why screens develop faults and what general care involves.
Anti-Glare and Glossy Screen Coatings
How matte and glossy screen finishes handle reflections, and why a more comfortable surface in bright rooms often costs some sharpness and contrast.
Backlight Bleed and Clouding
Why LCD screens show light leaking at the edges or cloudy patches in dark scenes, what causes it, and how people judge whether the amount is acceptable.
Cleaning a Screen Safely
General principles for cleaning displays without damaging their coatings, and why harsh cleaners, rough cloths and too much liquid cause lasting harm.
Dead Pixels and Stuck Pixels
How a dead pixel differs from a stuck pixel, what usually causes each, and why manufacturers publish policies that tolerate a small number of defects.
How Heat and Humidity Affect Displays
A general look at how high and low temperatures and moisture can affect screens and their electronics, from temporary slowdowns to faster aging and damage.
Image Retention on LCD and OLED Screens
How temporary ghost images differ from permanent burn-in on LCD and OLED screens, what is thought to cause each, and how people reduce the risk.
Screen Flicker and PWM Dimming
How screens dim by switching light on and off rapidly, why this can cause flicker, and why people perceive it very differently, with general ways to check.
What Is Damaged When a Screen Cracks
The layers beneath a screen's glass, why a crack often affects the panel, touch layer and electronics as well, and why repairs are often more than glass deep.
Why Screens Dim and Shift With Age
How backlights and light emitters change over years of use, what gradual dimming and color drift look like, and why aging varies between screens.
Related topics
More in foundations
Display Basics How LCD, LED and OLED screens work, how they compare and where they are heading. Testing and Calibration Understanding brightness, contrast, color and motion tests and why calibration matters. Panel Technologies The panel types and light sources behind modern and older screens. Specs Explained What the numbers and terms on a display spec sheet actually mean. Connections and Setup Cables, signals and settings that decide how a display behaves.