You bought a new monitor. You ran the test. You found a dead pixel — and now you're wondering whether that's enough to get a replacement. The frustrating answer: it depends entirely on which brand you bought, which model, and how many defective pixels you have.
Here's the brand-by-brand breakdown, the ISO standard that most policies are based on, and — most importantly — what to do if your count falls just short of the manufacturer's threshold.
The ISO Standard Behind Most Warranty Policies
Nearly every major monitor manufacturer references ISO 9241-302 (formerly ISO 13406-2) in their warranty fine print. This standard defines four defect classes based on pixel defect tolerance. Consumer monitors typically fall into Class II.
| ISO Class | Bright Pixel Limit | Dark Pixel Limit | Cluster Limit | Typical Use |
|---|---|---|---|---|
| Class I | 0 | 0 | 0 | Medical / mission-critical |
| Class II | 2 | 2 | 0 adjacent clusters | Consumer monitors (most common) |
| Class III | 5 | 15 | 3 or fewer clusters | Budget TVs, entry monitors |
| Class IV | 50 | 150 | 5 or fewer clusters | Industrial/signage displays |
Class II allows 2 bright defects and 2 dark defects before the display is technically out of spec. The catch: "defective" in the ISO sense means the panel doesn't meet spec at the factory — it doesn't automatically trigger a warranty claim. Each manufacturer writes their own threshold on top of this standard.
Brand-by-Brand Dead Pixel Warranty Thresholds
Here's what each major manufacturer actually requires before they'll replace your panel:
| Brand | Bright (Stuck) Pixel Min | Dark (Dead) Pixel Min | Notes |
|---|---|---|---|
| Dell (standard) | 6 | 8 | Standard Pixel Guarantee; UltraSharp uses Premium Panel Guarantee (0 bright defects) |
| Dell UltraSharp | 0 | 0 | Premium Panel Guarantee — any bright defect qualifies for replacement |
| LG | 3–5 | 5–8 | Varies by model; UltraGear series uses stricter threshold; check model-specific warranty doc |
| ASUS (standard) | 3 | 5 | Consumer monitors; ProArt has Zero Bright Dot guarantee |
| ASUS ProArt | 0 | 3 | Zero Bright Dot guarantee for ProArt line |
| Samsung | 5 | 8 | Odyssey gaming series may have different terms; consult warranty card |
| BenQ | 0 | 0 | Zero Dead Pixel Guarantee on most models — contact support for any defect |
| ViewSonic | 3 | 5 | Elite gaming series is stricter; Elite models qualify with fewer defects |
| AOC / Philips | 5 | 8 | MMD group; threshold consistent across brands; varies by model tier |
Bright Pixels vs Dark Pixels: Not the Same Threshold
A "bright" pixel (also called a stuck pixel) is always illuminated — it shows as a white, red, green, or blue dot on an otherwise dark screen. A "dark" pixel (truly dead) stays permanently black regardless of what's on screen.
Bright pixels are generally held to a stricter threshold because they're more disruptive. On a dark game scene or a movie with black letterboxing, a single bright dot is impossible to ignore. Most manufacturers treat 1–2 fewer bright defects as actionable compared to dark defects.
When counting for a warranty claim, keep the two types separate. If you have 3 bright pixels and 4 dark pixels, don't add them to get 7 — report each type individually and check them against the separate thresholds in your warranty document.
How to Document Dead Pixels for a Warranty Claim
Support agents need specifics. A vague report ("I see spots on my screen") gets dismissed faster than you'd expect. Here's what to prepare:
- Run a full-screen color test. Use our free pixel test tool — run black, white, red, green, and blue full-screen backgrounds. Dead pixels show on multiple backgrounds; screen smudges only show on bright colors.
- Count and categorize. Note exactly how many are bright (color/white) and how many are dark (always black). Note their approximate screen position (center, top-left corner, etc.).
- Screenshot or photo. Use a high-quality camera photo of the screen showing the defect, or take a screenshot during the test (though screenshots won't show hardware-level dead pixels — they'll appear correct in the capture).
- Find your serial number. Usually on a sticker on the back of the monitor. Support will ask for this to pull your warranty record.
- Note the date of purchase. Warranty windows start from purchase date, not from when you noticed the defect.
What to Do If Your Count Falls Short of the Threshold
You have 2 bright pixels but your brand requires 3. You're stuck — unless you act fast.
Use the store return window. This is the single most effective route for sub-threshold defects. Amazon, Best Buy, B&H, Costco, and most major retailers offer 15–30 day return windows with no defect count requirement. "I'm not satisfied with the product" is enough. The manufacturer's warranty threshold doesn't apply to retailer returns.
Escalate, don't accept the first "no." First-line support agents apply the policy by the numbers. Ask to escalate to a senior support team or warranty exception team. A single bright pixel near the center of a 4K display is genuinely unusual — and manufacturers don't want social media posts about it.
Wait and recheck. Stuck pixels sometimes resolve on their own, especially within the first few weeks of use. Stuck pixels (showing a color) are more likely to recover than truly dead ones. Run the JScreenFix test or use a pixel cycling tool — it doesn't always work, but it has no downside.
Check for "Zero Bright Dot" or "Zero Dead Pixel" guarantees. Some manufacturers sell this as a premium option at purchase, or include it on higher-end models (Dell UltraSharp, ASUS ProArt, BenQ). If you're shopping and this matters to you, it's worth paying for upfront rather than discovering after the fact that your standard warranty allows 3+ defects.
Clusters Count Differently
A cluster is two or more adjacent defective pixels. Most warranties treat a cluster as a single defect — which sounds generous until you realize the cluster threshold is often lower than the individual pixel threshold.
For example, under ISO Class II, zero adjacent clusters are allowed, even though up to 2 individual bright pixels may be tolerated. If your 3 dead pixels are all touching each other, that cluster likely qualifies for replacement even if the raw count doesn't meet the per-pixel threshold. Document clustered defects explicitly — note that they're adjacent, not scattered.
OLED Displays: Different Rules Apply
OLED monitors and TVs have stricter manufacturing tolerances than LCD panels, and their warranties reflect this. LG OLED TVs, for example, warrant against any visible defect within the first year under standard viewing conditions — a far stricter threshold than their LCD monitor warranties.
OLED also introduces burn-in risk, which most warranties explicitly exclude. If you see a persistent image artifact on an OLED, confirm it's a dead pixel (present on solid-color backgrounds) rather than burn-in (appears as faint ghost image) before filing a warranty claim — burn-in may not be covered.
Screen Mom Screen Cleaner Kit
Before filing a warranty claim, make sure what you're seeing is actually a dead pixel and not a smudge, fingerprint, or dust speck stuck to the panel. A proper cleaning kit eliminates that possibility quickly — and it's something every monitor owner should have anyway.
View on Amazon →Step-by-Step: Filing a Dead Pixel Warranty Claim
- Run the pixel test on our site and count defects by type (bright vs dark)
- Check your specific model's warranty document (search "[brand] [model] pixel warranty policy")
- If your count meets or exceeds the threshold: contact manufacturer support with serial number, purchase date, and photo documentation
- If your count is below threshold but within the store's return window: use the retailer return, no questions asked
- If below threshold and outside return window: try escalation to senior support, or try the stuck pixel fix method before giving up