Backlight bleed
Localized light around an LCD’s edges may remain in a similar place as your viewing angle changes. A browser image alone cannot establish whether it is a defect.
Backlight Bleed Test
Use a plain black screen to look for uneven light on your LCD. Check with your own eyes at your usual brightness and viewing position.
Before you start
Use your usual brightness
Keep a comfortable setting, rather than turning it all the way up.
Reduce reflections
Avoid light shining on the screen; keep some room lighting.
Look straight at the screen
Sit at your normal distance and inspect the edges and corners.
Esc Exit testTap the black screen to show controls.
What this test shows
The tool displays solid black so you can inspect your screen. It cannot read the physical light coming from the panel, detect a fault automatically, or assign a pass/fail score. Use what you see during normal viewing as well as this black-screen check.