You found a dead pixel on a screen you just purchased. Now you want to know whether your warranty covers it. The answer depends on which brand made your screen, which product tier you bought, and whether the defect position and count meet that brand's specific threshold. The ISO standard everyone references is a floor, not a ceiling, and most brands apply it selectively.
Before contacting any manufacturer, confirm exactly what you have. Run the dead pixel test on a solid white background, then on solid black. Count every defect. Note its position on the screen. A defect that is clearly visible near the center of the display is treated more seriously than the same defect in a corner, across every brand's policy. Document with photographs on both backgrounds before the warranty conversation starts.
This guide covers what each major brand actually requires, not what the ISO standard technically allows. The gap between the two is significant, and knowing it before you call support means you know exactly where you stand.
What the ISO Standard Says and Why It Is Not the Whole Story
The ISO 13406-2 and its successor ISO 9241-307 define display defect classes that set the acceptable number of pixel failures in a panel before it is classified as defective. Most manufacturers reference these standards in their warranty documentation.
Class I panels allow zero defects of any type. Almost no consumer product uses Class I panels because manufacturing yield at that standard is extremely low.
Class II panels, the standard for most consumer monitors and laptop screens, allow:
- Up to 2 fully dark dead pixels (Type 1 defects)
- Up to 2 fully lit stuck pixels (Type 2 defects)
- Up to 5 dead or stuck subpixels (Type 3 defects)
Class III panels allow higher defect counts and are used in budget and industrial displays where cost matters more than perfect pixel quality.
The ISO standard is a manufacturing benchmark, not a consumer guarantee. A monitor manufacturer that ships a Class II panel is within specification when it has one dead pixel. That does not mean the consumer cannot or should not make a warranty claim. It means the manufacturer's baseline obligation under the standard is met. The actual warranty policy may be stricter or more lenient than the standard depending on the brand and product tier.
Most premium brands have learned that applying the full ISO allowance creates bad reviews. Their published dead pixel policies for consumer products are typically stricter than the standard requires, particularly for zero-bright-pixel guarantees on high-end monitors.
Samsung Dead Pixel Policy: Monitors and TVs
Samsung applies the ISO 9241-307 Class II standard to most of its monitor and TV lineup. For standard consumer monitors, Samsung requires five or more dead pixels before authorizing a panel replacement under warranty.
Samsung divides defect types by position and type when applying this threshold. Dead pixels in the center zone of the screen are weighted more heavily than defects in the corners. A cluster of two or three dead pixels near the center may receive more sympathetic handling than five dead pixels scattered across the corners of a 32-inch monitor, even if the count technically falls below Samsung's stated threshold.
For Samsung TVs, the policy is functionally similar. Dead pixel lines on Samsung TVs, which usually indicate T-con board failure rather than panel defects, are handled differently than isolated dot defects. A full-width horizontal or vertical line typically receives warranty service more readily than isolated pixels, partly because the repair is a board replacement rather than a panel replacement and costs Samsung less to authorize.
Samsung's dead pixel support process requires you to register the product in your Samsung account, contact support with the model number and purchase date, and provide photos or video of the defect. Samsung sends a technician for in-home TV service. For monitors, Samsung may authorize a replacement unit through the retailer or a direct warranty exchange.
Apple Dead Pixel Policy: MacBook, iMac, and iPad
Apple does not publish a specific dead pixel count for replacement. The dead pixel policy for Apple devices is handled through Genius Bar assessments on a case-by-case basis.
In practice, Apple's approach is stricter on quality than ISO standards but more flexible on count than Samsung's published threshold. A single dead pixel near the center of a MacBook Pro Retina display that is clearly a manufacturing defect, and not caused by physical damage or accidental damage, typically qualifies for display replacement under the standard one-year warranty. The same single dead pixel on a MacBook Air in the corner of the screen may receive a different response depending on the technician's assessment and the store's current policy interpretation.
AppleCare and AppleCare Plus extend the warranty period and provide additional coverage. Physical damage and accidental damage are not covered under the standard warranty but are covered under AppleCare Plus's two incidents per year provision with a service fee.
The dead pixel policies for the 2017 MacBook Pro specifically are covered in the dead pixel MacBook Pro guide, which includes the context of the flex cable failure pattern that affected that model and how Apple handled claims both within and outside the standard warranty window.
Dell Dead Pixel Policy: Standard vs Premium Panel Guarantee
Dell has two distinct dead pixel policies depending on which monitor line you purchased.
Standard Dell monitors follow the ISO 9241-307 Class II standard. A single dead pixel on a standard Dell monitor in a corner of the screen does not qualify for a warranty replacement under Dell's baseline policy. Multiple dead pixels or a defect near the center zone may qualify depending on the specific count and type.
Dell's premium monitor lines, including the UltraSharp series and certain gaming monitors, come with a Premium Panel Guarantee. This guarantee covers any single bright dead pixel (fully lit stuck pixel) for a no-questions-asked panel exchange. The Premium Panel Guarantee is documented on the product page and in the warranty card. It applies to the first year of ownership on most models.
Dark dead pixels (fully off cells) are treated differently from bright stuck pixels under Dell's Premium Panel Guarantee. The guarantee specifically covers bright pixels because they are more visible and more disruptive than dark pixels on most content. Check your specific model's warranty documentation to see whether dark pixels are explicitly included.
To claim under the Premium Panel Guarantee, contact Dell's warranty support with the monitor's service tag number, describe the defect, and provide a photo of the bright pixel on a dark background. Dell typically processes these as an advance replacement: they ship the replacement monitor before you return the defective unit, which reduces downtime.
AOC, ASUS, and Alienware Dead Pixel Policies
These three brands cover a significant portion of the gaming and professional monitor market and each handles dead pixels differently.
AOC applies the ISO 9241-307 Class II standard to its standard monitor lineup. AOC's published policy for most models requires a minimum of three dead pixels before a replacement is authorized. AOC's warranty process goes through the retailer for the first 30 days, then through AOC's own support after the return window closes. AOC has a reputation for fairly lenient handling of single dead pixels on newly purchased monitors, particularly when the defect is reported within the first two weeks.
ASUS offers two levels of dead pixel coverage depending on the monitor series. Standard ASUS monitors follow ISO Class II. ASUS ProArt monitors and certain ROG gaming monitors come with an ASUS Dead Pixel Policy that covers zero bright pixels and requires fewer dark pixels than the ISO standard before replacement. ASUS publishes its specific dead pixel policy for each product line in the product specification sheet. Check the spec sheet for your specific model number before contacting support.
Alienware, which is a Dell subsidiary, inherits Dell's premium panel philosophy. Most Alienware gaming monitors include a premium zero-bright-pixel guarantee similar to Dell's UltraSharp line. Alienware's support process uses Dell's infrastructure, so the service tag system and advance replacement program apply the same way.
How to Document a Dead Pixel Claim That Gets Results
The difference between a warranty claim that results in replacement and one that gets denied often comes down to documentation quality.
Step one is to confirm the defect type using the dead pixel test. Run it in fullscreen and identify each defect as dark (dead), bright (stuck), or partial (dead subpixel). Count each type separately, because manufacturers track them separately under the ISO classification.
Step two is photographs. Take photos with a phone camera, not screenshots. Screenshots record the intended signal, not the actual display output, and do not capture hardware pixel defects. Photograph the defect on a solid white background and a solid black background. The white photo shows dark dead pixels. The black photo shows bright stuck pixels. Include both in your claim submission.
Step three is recording the position. Describe defect location in relation to screen dimensions. "Two inches from the top left corner" is more useful than "in the corner." If you can measure the distance in centimeters from two adjacent edges, include that. Some manufacturers' support systems log defect position to determine whether it falls within their center-zone threshold.
Step four is timing. Report the defect as soon as you notice it. Most manufacturers ask when the defect first appeared. A defect reported within the first two weeks of purchase is harder to argue as wear-related than one reported six months later.
If a manufacturer rejects a claim based on count, and your count subsequently increases past their threshold, escalate with updated documentation. An escalation showing a progressive defect carries more weight than the original single-defect report. The dead pixel test guide has the full breakdown of ISO classification and what specific defect types count toward each threshold.
When a Retailer Is the Better Path Than the Manufacturer
Most major electronics retailers have return windows that operate independently of the manufacturer's warranty policy. Best Buy, Amazon, Micro Center, B&H Photo, and others each have their own return or exchange window that is usually 15 to 30 days from purchase.
Within that window, a dead pixel is almost always grounds for a return or exchange regardless of whether the manufacturer's threshold is met. The retailer's return policy does not care about ISO class standards. One dead pixel is enough to return the product and get a replacement with no threshold debate.
This matters most in the first month of ownership. If you find a dead pixel on a new monitor and you are within the retailer's return window, go through the retailer first. You get a new unit faster, with less friction, and without having to navigate the manufacturer's support queue.
After the return window closes, the manufacturer's warranty policy is your only path other than out-of-warranty repair or replacement. That is when knowing the brand-specific thresholds and documentation requirements in this guide becomes directly useful.
For running the test before a return or claim, the developer section has the dead pixel test and the stuck pixel fixer available to use immediately in a browser.
