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Retina display discoloration

The retina display on MacBook Pro has discoloration at many places, i.e., it is not completely black any more. I may have rubbed it off hard with a cleaning cloth. Is there any way to restore it? Thanks.

MacBook Pro (Retina, 15-inch, Mid 2014)

Processor 2.5 GHz Intel Core i7

Memory 16 GB 1600 MHz DDR3

Built-in Display (15.4-inch 2880 x 1800)

Graphics Intel Iris Pro 1536 MB

500 GB Flash Storage

macOS Sierra 10.12.6

最后更新：2017-09-25 18:44:09

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