Hi Mi Fans,
I hope you all are doing great and having a wonderful time on Mi Community.
The nature of these issues are different & some have an easy fix However,some may need a display replacement in order to get the device back in proper working conditions
Also I am going to discuss about the dead pixel issue and can be observed in any smartphone in the form of lines or dots.
Display resolutions are getting better generation by generation, so it can be really hard to spot a dead pixel.But, with the full screen images of solid color,they become much easier to detect.
Below,I have attached a set of images that should make it easy to find a dead pixel and will outline the process in more detail after the jump.
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For most smartphone dispalys, each pixel is comprised of three separate sub-pixels are lit up,the resulting color is white.
So, if you have an entirely dead pixel, it would be easy to recognize as it would simply be black.But, if one or two sub-pixels have failed, the pixel will only be off-colored.This is why it's a good idea to check for dead pixels against an array of colors.I have attached six images of varying solid colors in the two galleries below and each image is in 16:9 aspect ratio,which will fill the entire screen on most smartphones.
The images are 1440p resolution so they are dense enough to fill out every single pixel on.most of the smartphones.
You can view thess image directly in your smartphone's browser,or you can save them to your phone if you'd prefer.Just make sure that your gallery app or internet browser is in full screen mode (if possible).So,that no pixel is left unlit.
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Inspect your display while viewing each of these images,keep an eye out for any tiny black dot.If you find such a dot,this is likely due to a fully dead pixel.On the other hand,if a pixel look discolored or you see a grayish dot,you may have one or more faulty sub-pixel.
For most of the manufacturers,a display with dead pixel is covered under warranty and such warranty last for a year.
NOTE:- To do a hardware test on your Xiaomi's phone dial - *#*#6484#*#*
Then click display as shown in the picture below.
After clicking on display simply tap on the screen to start the test.
As you will tap on the screen it will show you the blue color on th full display then again on tap it will show you green color and again on tap it will show you red color. So,in this process you can easily find out the dead-pixel on the screen.