如果 accidentally pressed the phone's power button to shut it down without turning off, you can try restarting the device. This involves holding down the power button for 7-10 seconds until the device turns on again. If that doesn't work, you may need to reset your device by holding down the power button and volume down buttons simultaneously for 10 seconds.
1、关闭手机电源。
2、将手机的电池取出。
3、打开手机的后盖，检查是否有松动或损坏的地方。
4、用适当的工具（如螺丝刀）重新固定好螺丝。
5、如果以上方法都无法解决问题，可能需要考虑更换电池。
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