Why is there no sound and display in vivo Ya 17t SMS?

According to your description, I suggest you try the following methods:

1. You can set-sound-message ringtone, or go to message-click the left menu button-Settings-Notification to try.

2. You can try to update the system version optimization system: click Settings-More Settings-System Upgrade-Check the update immediately, download the upgrade package according to the prompt, and click Check Installation, and the phone will restart and automatically enter the upgrade mode.

I suggest you try to restore the factory settings. Click Settings-More Settings-Restore Factory Settings-Restore All Settings. Restoring all settings will not delete any data in the phone.