Colour tests
Black Screen TestHot pixels and light leaksWhite Screen TestDead pixels and dustRed Screen TestRed subpixels and tintBlue Screen TestBlue subpixels and uniformityPanel health
Dead Pixel TestFind dead and stuck pixelsBacklight Bleed TestLight leaking at the edgesOLED Screen TestBurn-in and image retentionTouch Screen TestMultitouch and dead zonesImage quality
Greyscale TestGrey ramps and stepsColor Banding TestSmooth gradients, no stripesContrast TestBlack and white levelsYou switch off the lights, open a black screen, and see light in the corners. Is your new monitor faulty? Maybe, or maybe not. Two different things cause light on a black LCD screen: backlight bleed and IPS glow. One is a manufacturing flaw, the other is normal for the panel type. Here is how…
A single dot that will not change color is one of the most annoying screen defects. The good news: some of these dots can be fixed. The first step is working out which kind of pixel problem you have. Stuck, dead or hot? Every pixel on an LCD is made of three subpixels: red, green…
Color banding is when a smooth change of color, like a sunset sky or a dark shadow, shows up as visible stripes instead of a gentle blend. It is very common, and often it is not the monitor’s fault. Here is how to test for it and what to try. Test for banding Open our…
Panel quality varies, even between two monitors of the same model. Most retailers accept returns for any reason within a few weeks, while manufacturer warranties often only cover serious defects. So the best time to find a problem is the day the monitor arrives. This checklist takes about ten minutes with our free screen tester….