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Originally Posted by Josieb1
I thought dead pixels were bright spots? I have a couple on my 6 inch Aura
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A dead pixel can either light or dark on an eInk screen depending on which state it gets stuck in. Bright spots tend to be issues with the lightguides for the frontlight or grunge stuck on the screen. To check for dead pixels, you can display an white image filling the screen and then a black image filling the screen. Assuming your screen is clean, any black spots on the white or white spots on the black are dead pixels. For the lightguides, I display a black image, turn on the front light and look for any bright spots and a white image and look for even lighting.
This is unlike a LCD screen where the most common failure mode for pixels leaves them clear so they don't block the backlight from shining through and you get bright spots.