Lenovo s850t speaker down. What happened?

According to the description, it is recommended to refer to:

1. First, adjust the volume through the volume button. It is recommended to adjust the comparison audio when playing.

2. Replace the software or audio source for speaker playback, which does not rule out that the volume of the software or audio source itself is low;

3. If the replacement software or sound source is invalid, please back up the data and try to restore the factory settings. Back up some important documents and files, such as SMS, contacts, photos, software, etc., before resuming operation. To avoid unnecessary losses;

If the factory settings still cannot be solved, it is recommended to go to Lenovo maintenance site for inspection and maintenance in time.