Screen Issues provides a free online screen testing service, mainly used to discover and locate screen display defects. Its detection scope covers common problems: dead pixels (pixels that are permanently dark), bright spots (light emitted where there should be none), backlight bleed (light leaking from the edges of LCDs), screen burn-in (ghosting), color banding, color unevenness, subpixel failures, and motion blur caused by response time.
Main capabilities:
- Solid color tests: displays white, black, red, green, blue, and gray solid color screens in sequence, used to expose dead pixels and bright spots.
- Gradient tests: red, green, and blue gradients, used to reveal color banding, color tinting, and uniformity issues.
- Test patterns: includes horizontal lines, vertical lines, grids, checkerboards, and RGB stripes, used to find pixel row, column, or subpixel failures.
- Motion blur test: evaluates monitor response time through moving squares; trailing or ghosting indicates slower pixel response.
How to use:
- Click the preview card to start full-screen automatic cycling, displaying all tests one by one. Before testing, it is recommended to close applications or windows you do not want to be visible.
- You can use the Next/Previous buttons or the left and right arrow keys on the keyboard to switch colors, and press the spacebar to advance one test step.
- Under each solid color screen, carefully observe whether there are dark spots, bright spots, lines, color tinting, or uneven brightness. It is recommended not to rush; stay on each color for a few seconds.
- A brightness slider is provided at the bottom of the full-screen view; lowering the brightness helps make backlight bleed and uniformity issues more obvious.
- Keyboard shortcuts: left and right arrow keys to switch, spacebar to advance, ESC to exit full screen.
Applicable scenarios:
- Inspecting newly purchased devices to check whether the screen has manufacturing defects.
- Checking the screen condition of an existing device before returns or exchanges.
- Can be used on laptops, monitors, tablets, or smartphones.
Limitations: Regarding the tool's specific fees, pricing, platform compatibility details, whether mobile browsers are supported, detection accuracy, etc., the information does not provide these at this time.