According to wikipedia the Kindle 8 was released June 2016. Four years doesn't seem long enough for something like this to happen on its own. Do you remember if you left it in a car that was parked in the sun or had done something else that may have damaged it?
I have a Kindle Touch, 4th generation, announced in 2011, and its display is still fine. Every so often I forget for several months (or years) to charge it and it takes at least a day for it to wake up and start charging so running the battery down doesn't seem to be something that affects the display.
Last edited by hobnail; 10-02-2020 at 10:52 PM.
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