Why sound related items not working?

I have mi 5. Loud speaker (none of the speaker) not working, YouTube not working, some games not working, headphone not working. Hanging when calling (have to restart after it gets hang). First I thought it's a software problem. Then I reset the phone, next I rooted the phone, installed some custom ROMs. Then also the same problem. So it's a hardware issue I guess. I think sound chip damaged. I want any solution as soon as possible.