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オリジナル投稿者: Beard Boy ,

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There could be a simple solution too. I had same issue, screen will go black once locked (or auto lock). Phone will remain on, but nothing will be visible. Removing battery and re-inserting only will bring display back.

Now it’s fixed. Here is the solution. Check your brightness level, if it is reduced to zero, increase a bit and set it. Lock your phone and unlock - you see no more display black issue.

P.S: This is applicle only for display changed mobiles

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