Free, browser-based display tools
Bart Television runs entirely in your browser. The dead pixel test cycles solid colors across the full screen so you can spot stuck or dead sub-pixels. The burn-in fixer plays a brief sequence of strobing colors that some users run on OLED and plasma panels to reduce mild image retention. Both tools open fullscreen and can be exited at any time with the Escape key.
Below the tools, you'll find an ambient video directory — short, looping clips that work as background visuals on bar, lounge, and waiting-room screens. Pick a category to filter, click a thumbnail to open the loop in a player.
Ambient Video Directory
Filter by category. Each thumbnail opens an embedded YouTube player set to loop.
About these tools
Dead pixel test
A dead pixel is a pixel that no longer changes state — it stays black or a single color regardless of the image. A stuck pixel is similar but often shows one of the primary sub-pixel colors (red, green, or blue). Cycling solid full-screen colors is the standard way to identify either: against a uniform field, a faulty pixel reads as an obvious dot.
The test cycles red, green, blue, white, and black. Click or press any key to advance to the next color. For a deeper explanation of causes and remedies, see the dead pixel guide.
Burn-in fixer
Burn-in, more accurately called image retention, happens when a static image is displayed for so long that its outline becomes faintly visible after the content changes. It is most common on OLED and plasma panels and largely a non-issue on modern LCDs. Rapid color cycling is one informal remedy that some owners try for mild cases.
The fixer flashes high-contrast colors at a fast pace. Because rapid flashing can trigger seizures in people with photosensitive epilepsy, the tool shows a confirmation prompt before starting. For background and prevention guidance, see the burn-in guide.
Ambient video directory
The directory currently focuses on nature and abstract loops — material that holds up as background visuals without demanding attention. Each entry links to a full YouTube video, so the source channel keeps credit and watch time.
Choosing the right loop for a venue is more involved than it looks: aspect ratio, sound design, license terms, and brightness all matter. The ambient video guide walks through the criteria.
Last reviewed on 2026-04-28.