Quote:
Originally Posted by robko
Definitely a broken substrate. IMHO from what I've seen it's often some sort of twisting of the device rather than a drop or something dropped on the screen.
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This - the device has been misused in some way by someone or something: twisted/bent/leaned on/impacted/frozen/overheated, or some combination of the above. It can be easy to do if you're not aware of how careful you need to be with an e-ink device, especially if the device isn't in a good case. No amount of resetting or fiddling with the innards will do anything. The display substrate is physically shattered.