Inspection Guide

TV Screen Test Guide

Big-item returns are costly and demo modes hide defects — run the 8 steps in 20 minutes before you sign.

Dead Pixels
Bleed & DSE
Blooming
HDR Test
Color Gamut
Motion & MEMC
Greyscale
Viewing Angle
8 Steps≈20 Minutes28+ ToolsEssentialRecommendedOptional
Minimum Recommended Specs4K95% DCI-P3120Hz1000nit+ HDR
Why You Need This

Why You Need This

Big-item returns are costly

Returning a 65"+ TV costs serious freight and liability gets murky after signing — power on and test before acceptance.

Demo modes hide defects

Store loops are all saturated scenery that masks bleed, DSE and greyscale flaws — only proper test patterns at home reveal the truth.

Check before signingDemo modeBig-screen uniformityMini LED blooming

Testing TV-as-monitor too

For PC use you also need 4K120, 4:4:4 chroma and input-lag checks — all covered by the flow.

Runs in the TV browser

Most smart TVs can open this site in their built-in browser — no USB drive needed.

The 8-Step Inspection Flow

The 8-Step Inspection Flow

Test each item in order — every step links to a free online tool.

01

Dead Pixels

Essential

Cast or open solid-color tests, cycle colors full-screen — locate defects up close, confirm visibility from 2m.

Verdict：Even 1 dead pixel usually qualifies a TV panel for replacement.

Open Tool
02

Bleed & DSE

Essential

Full black for edge bleed; 50% grey for DSE clouding — large-scale mura is most visible on mid grey.

Verdict：Large DSE clouds that affect sports or games justify an exchange.

Open Tool
03

Blooming

Essential

Mini LED essential: move a small white square on black and watch whether the halo stays controlled and subtitles don’t glare.

Verdict：Subtitle halos that ruin dark scenes and can’t be toned down warrant an exchange.

Open Tool
04

HDR Test

Recommended

Verify HDR10/Dolby Vision triggers, peak brightness reaches spec, and highlights plus shadows keep detail.

Verdict：Advertised HDR that won’t trigger or is clearly dim is a missing feature.

Open Tool
05

Color Gamut

Recommended

Verify 95% DCI-P3 with wide-gamut patterns; budget sets often fake wide gamut via phosphor boost.

Verdict：Measured gamut far below marketing with visibly dull color supports a misrepresentation claim.

Open Tool
06

Motion & MEMC

Recommended

Test trailing on fast motion; toggle MEMC to compare smoothness versus artifacts (soap-opera effect, breakup).

Verdict：MEMC artifacts you can disable are normal; severe trailing with it off is a panel-quality issue.

Open Tool
07

Greyscale

Optional

Check shadow gradation — budget sets crush blacks or clip whites; also watch for tinted greys.

Verdict：Shadows that stay crushed after brightness/gamma tuning hurt dark-scene viewing.

Open Tool
08

Viewing Angle

Optional

Walk 30-45° off-axis and watch brightness falloff and color shift — VA panels grey out noticeably.

Verdict：VA angle falloff is physics, not a defect; strong tinting on IPS may be negotiable.

Open Tool
Key Terms

Key Terms

MEMC

Frame interpolation from 24/30fps to 60/120fps. Smoother, but can cause soap-opera effect and artifacts.

HDMI 2.1

48Gbps interface enabling 4K120, VRR, ALLM — essential for gaming; watch for full vs reduced-bandwidth ports.

DSE (Dirty Screen)

Cloudy mura on large flat colors — most visible on sports fields and game skies.

Local Dimming

Number of Mini LED dimming zones — more zones mean smaller halos; budget sets have dozens to hundreds.

Peak Brightness

HDR highlight brightness. True HDR needs 1000+ nits; below 500 it’s basically decode-only.

Input Lag

Milliseconds from controller input to display. Game mode should be <15ms; movie modes often exceed 50ms.

Recommended Gear

Colorimeter / certified cable recommendations coming soon.

Panel Technology Compared

Panel Technology Compared

Mini LED

Bright & big
Pros
  • Bright, living-room friendly
  • Long life, no burn-in
Cons
  • Subtitle halos
  • Coarse dimming on few zones

OLED

Cinephile
Pros
  • Pixel-level true black
  • Excellent viewing angles
Cons
  • Burn-in risk & ABL
  • Lower full-screen brightness

QLED

Quantum VA
Pros
  • Vivid color, high brightness
  • Good value
Cons
  • Narrow viewing angles
  • Average native contrast

普通 LED

Budget
Pros
  • Cheap
  • Mature & reliable
Cons
  • No dimming, visible bleed
  • Weak gamut & HDR
Return vs Normal

Return vs Normal

Should Return

  • Any single dead or bright pixel
  • Large DSE clouds visible from normal seating distance
  • Missing HDMI 2.1 features: 4K120 won’t light up or VRR doesn’t engage
  • Uncontrolled blooming that ruins dark scenes
  • Obvious fixed bleed along bezels or edges

Normal Behavior

  • Mild subtitle halos on Mini LED in dark scenes
  • OLED ABL dimming on large bright scenes
  • VA contrast/color falloff off-axis
  • MEMC artifacts (can be disabled in settings)
  • Mild uniformity variance when cold that improves warm
Not sure? Use the 8-step wizard to judge item by item and export a PDF report →
Testing Environment Tips

Testing Environment Tips

1Power on and test before signing; photograph the packaging
2Disable demo mode and auto-brightness first
3Use Cinema/Standard picture mode — Vivid oversaturates
4Dark room for bleed/black level; living-room light for DSE
5Judge visibility from your real seating distance (2.5-3.5m)
6Finish all tests before wall-mounting — returns get harder after
FAQ

FAQ

Inspection Timeline

Inspection Timeline

Prep~3 min
Steps 1-3~6 min
Steps 4-6~6 min
Steps 7-8~3 min
Device Checks~2 min
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