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MY iPhone start to over heating and draining battery during playing games for last two weeks , so i changed the battery but now a blue screen appear ( see the video ) after booting the phone for 3 to 5 minutes and some time the phone is over heatingand the battery percentage don’t move when charging or when using the phone and the percentage drop %10 to %20 when i turn off and on the phonei tried 2 batteries but the same problem https://youtu.be/AI9DQ9G4O8Q help ?!

For random bluescreen you maybe damage camera flex. Remove that and check https://www.youtube.com/watch?v=RWE0K3ut… Let me know if solved. See you.