The display might be damaged or just gone bad. Perhaps it is time to replace it.
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It’s important to be able to see your full screen on your device, NK26. While it’s certainly possible that the screen just stopped functioning after having your device a few years, we can explore what else might have happened. Has there been any damage to the device or screen? Has the device been exposed to liquid or moisture? Had anything changed on or happened to the device around the time this started?
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