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Hallo i have problem with my iphone xs 64gb A week ago i changed screen, iT was original refurbished screen. For dome days All works fine but now screen IS black but touch IS working. But after restart iphone or battery unplug and plug IT works fine I updated software to beta iOS 15 What Can be wrong? Thanks for All replays And this IS looping angain and again. Update (06/20/2021) And IT was turning screen to black randomly

This will defiantly be a parts problem. The most common parts to cause this are. ·         Dock assembly. ·         Front flex assembly. ·         Battery. ·         Screen. You say your phone is now looping so I would first rule out the screens front flex assembly by disconnecting it. If that is not the fault you will have to rule out the other above parts.