How to Check Dead Pixels in your Smart Device?
You have recently acquired the latest smart phone in the flagship series, or else you have an old device. Almost all users believe that their phones and tablets are free from any issues.
The last thing you can imagine is having dead pixels on the device’s brightly-lit display. But what you don’t know is that even the most popular brand names out there, including Samsung Galaxy series and iPhones can have dead pixels.
So how can you detect these non-lit pixels?
1. Download Colored Images
Download images colored in Red, Blue, Green and Black from this source –
Typically, the modern smart phone display has each one of its pixels made up of 3 sub-pixels colored as Red, Blue and Green. The underlying technology uses all these colors in combination (at different ratios) to create all other colors.
Once you have downloaded the colored background images, open them on your device. The gallery view app should be in the full screen mode.
If there is a dead pixel, you will see a black dot in the area. If one or more sub-pixels are dead, the pixel will go off-color.
2. Check the Display
View each of these 6 images on your phone/tablet and look for any signs of black dots. Any instance of a black dot means that there is an entirely dead pixel. A gray dot or a discoloration is a sign that 1 or 2 sub-pixels have failed.
If your device is within the warranty period, keep in mind that dead pixels will usually be covered. You should contact the manufacturer and tell about the problem.
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Usually, Apple will not have any issue to replace the screen or device (within the warranty period), and so will many other manufacturers.
Make sure to check your device every 3 months using this technique.