Frequently Asked Questions

A dead pixel is a pixel on your screen that permanently displays black because its transistor has failed. It receives no power and cannot produce any color. Dead pixels are visible as black dots against all background colors and cannot be fixed — they require screen replacement.

A stuck pixel is a pixel that remains fixed on one color (typically red, green, or blue) because one of its sub-pixels is stuck in the "on" position. Unlike dead pixels, stuck pixels may be fixable using software methods or gentle pressure techniques, with a 30-60% success rate.

Dead pixels appear black on all backgrounds because they receive no power. Stuck pixels show a fixed color (red, green, or blue) because a sub-pixel is stuck "on." Dead pixels cannot be fixed; stuck pixels sometimes can be revived. Test with our Dead Pixel Test and Stuck Pixel Test tools to identify which type you have.

No, dead pixels don't "spread" like a virus. Each pixel failure is independent. However, if your screen has underlying damage from impact, pressure, or manufacturing defects, more pixels may fail over time. One dead pixel doesn't cause others to fail.

Most manufacturers consider 0-5 dead pixels "acceptable" and won't replace screens with fewer pixels. Premium monitors may have zero-dead-pixel guarantees. For new purchases, any dead pixel is grounds for return within the retailer's return window (usually 14-30 days).

1) Open our Dead Pixel Test tool. 2) Enter full-screen mode. 3) Cycle through pure colors (white, black, red, green, blue). 4) Look for pixels that don't change color. 5) Black pixels on white background are dead; colored pixels on black are stuck. The entire test takes 2-5 minutes.

Yes, online testing is as accurate as downloaded software. Both display the same pure colors. Online tools have advantages: no installation, works on any device, and instant access. Our tool uses HTML5 canvas for pixel-perfect color rendering.

No. Our Dead Pixel Test runs entirely in your browser. No download, installation, or signup required. Just open the page and start testing immediately. This also means no malware risk and no system modifications.

A basic test takes 2-5 minutes to cycle through all colors. For thorough inspection, spend 30-60 seconds on each color, checking different areas of the screen. Test in a dimly lit room for best visibility of defects.

Yes, our tool works on any device with a web browser: phones, tablets, laptops, monitors, and TVs. Just open the test page, enter full-screen mode, and inspect your display. Touch devices work the same way as desktop browsers.

True dead pixels (permanently black) cannot be fixed. They are hardware failures. If you have dead pixels on a new purchase, return it immediately. If under warranty, check manufacturer policy. Out of warranty, you'll need screen replacement.

Try these methods in order: 1) Software fix — use our Stuck Pixel Test which flashes rapidly cycling colors for 10-30 minutes. 2) Pressure method — gently press the stuck pixel with a soft cloth while the screen is off, then turn on. 3) If methods fail after 2-3 hours total, the pixel is likely permanent.

Software flashing: 30-60% success for stuck pixels, 0% for dead pixels. Pressure method: 20-40% success for stuck pixels, 0% for dead pixels. Combined methods may improve odds slightly. Dead pixels cannot be fixed by any method.

The pressure method carries risk. Pressing too hard can permanently damage your screen or create more dead pixels. Use minimal pressure, a soft cloth or rounded stylus, and stop immediately if you see spreading damage. We recommend trying software methods first.

Fixed stuck pixels may return, especially if the underlying cause is hardware degradation. Success rates vary, and some pixels will fail again within days or weeks. If a pixel keeps getting stuck, it may eventually become permanently dead.

Most manufacturers require 3-5+ dead pixels before honoring warranty. Policies vary: Dell Premium Panel Guarantee covers 1+ bright pixel; Samsung Zero Dead Pixel covers 1 pixel on premium models; standard warranties typically require 5+ pixels. Check your manufacturer's specific pixel policy.

Stuck pixel warranty coverage varies by manufacturer. Some brands don't cover stuck pixels at all, only dead pixels. Premium warranties may cover both. Always check your specific warranty terms. Retailer return policies are usually more generous than manufacturer warranties.

Dell: 1+ bright pixel, 6+ dark pixels. LG: 5+ pixels (varies by model). Samsung: 1 pixel on premium Zero Dead Pixel models. ASUS: 1 bright pixel on Zero Bright Dot models. Apple: Varies by product, check Apple Support. For detailed policies, see our How to Fix guide.

1) Document pixel locations with photos. 2) Check manufacturer's pixel policy online. 3) Contact customer support via phone, chat, or email. 4) Provide proof of purchase and pixel photos. 5) Follow the RMA process. Most claims take 1-2 weeks for approval and replacement.