Backlight bleed inspection
Inspect black and near-black fields for persistent patches of light.
Dim the room, use a normal viewing angle and comfortable brightness, then inspect edges.
Enable JavaScript to run this interactive test. The guide and methodology below remain available.
How to run this check
Dim the room, use a normal viewing angle and comfortable brightness, then inspect edges.
Understand the result
PASS describes a received signal or your recorded observation. WARNING calls for another check. USER REVIEW REQUIRED means a measurement alone cannot decide. An unavailable API or denied permission does not establish hardware failure.
What this cannot tell you
Viewing-angle glow and camera exposure can exaggerate leakage. This cannot measure luminance.
If something seems wrong
Compare straight-on and angled views; document persistent patches under normal viewing conditions.
Find troubleshooting help →Good to know
Is anything uploaded?
Raw diagnostic input and media are processed locally. Results remain in this page’s memory until you download a report or leave. Hosting requests still reach the site host. See the privacy policy.
Does a pass guarantee my hardware is healthy?
No. It records behavior observed in this browser session. Intermittent faults, internal components and operating-system restrictions need further investigation. See our methodology.