Dirty Screen Effect Test
Test your monitor or TV for dirty screen effect (DSE) — uneven patches visible on uniform gray or colored backgrounds.
How does this test work?
A dirty screen effect test shows uniform gray backgrounds at different brightness levels. Uneven cloudy patches or bands indicate DSE, which is caused by manufacturing inconsistencies in the panel.
How to use the Dirty Screen Effect Test
Open the Dirty Screen Effect Test on any device with a modern browser — desktop, laptop, tablet, or phone. No downloads, plugins, or signup required. The tool loads instantly and works in Chrome, Firefox, Safari, Edge, and other Chromium-based browsers.
Follow the on-screen instructions to run the test. Results are displayed immediately in your browser. You can repeat the test as many times as needed. For the most accurate results, close other tabs and applications to reduce interference.
Privacy: This test runs entirely in your browser using standard web APIs. No data is collected, uploaded, or stored on any server. Camera, microphone, keyboard, mouse, and controller inputs are processed locally and never leave your device. DeviceKit does not use analytics cookies or tracking scripts.
Browser note: Some hardware values are estimated because browsers limit direct access to device hardware for security and privacy reasons. Results may vary slightly between browsers and operating systems. For the most reliable measurements, use an up-to-date version of Chrome or Edge on a desktop computer.
Frequently Asked Questions
What causes dirty screen effect?+
DSE is caused by uneven pressure on the LCD panel during manufacturing. It appears as cloudy or splotchy areas on uniform backgrounds, especially gray.
Can dirty screen effect be fixed?+
DSE is a manufacturing defect and cannot be fixed by the user. It may be grounds for a warranty exchange if severe.
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Gradient Banding Test
Test your monitor, TV, or phone for gradient banding and color stepping artifacts using smooth color gradients.