Why is there no sound in the smartphone?

Question

Android

I decided to listen to music through the speakers. When I connected the device, a long sound went through the speakers, something like ultrasound. I immediately turned off the phone and found that the sound does not work in any mode: neither through the speakers, nor through the headphones, nor during a call. When I try to turn on the player, the playback goes on, but instead of music, there are noises, as if the radio hissed or like speakers hiss when the phone next to them rings.
As it turned out, the "tulips" on the buffer were connected incorrectly.
Device - Jiayu S3 Advanced
What can I do?

Answer 1

Turn off-turn on the smartphone. If it doesn't work again - they sent it to the service, it means some cascades ....