Xperia sound issue..

First of hi everyone im new member of xda community and sorry for my "bad" English.
I got problem with xperia Z.
My loud speaker is not working it has cracking sound and he is buzzing when i try to play music, i tried to flash with custom and stock roms, try to change speaker but without results, my vibration is not working to i saw on forum shorting circuit will fix vibration but i dont know how to do it.

If someone got similiar problem like i do please wrote answer im frustrated without sound cant hear when someone is calling me ...