Hi @Ольга14, welcome to the community! Your query was translated to English, since this is a international forum.
I'm sorry to hear that! Have you tested the speakers in our diagnostics tool? You can find Diagnostics if you go to Settings > About phone > Diagnostics. Run the test on the Loudspeaker and see if they work here. You should also make sure that your media volume is on. You do this by going to Settings > Sound > Media Volume.
If the media volume is turned on but you still can't hear any sound from the speakers even in the Diagnostics test, try restarting your phone in safe mode, just to make sure that no third party application is interacting with your phones speaker functions. In safe mode, all third party applications are temporarly inactive, but you can still use your phones basic functions like calling and textmessaging. Play a video or a song in safe mode and see if notice any change.
If the speakers still doesn't behave like they should, a software repair using Xperia Companion could help. A software repair will remove all data stored on the internal memory and reinstall the latest available version, so make sure that you do a backup using Xperia Companion before you start, so you can keep your data.
Keep me posted, and have a nice day!
