If there is a RESET function, perform a RESET. Adjust the volume setting on your portable player in order to increase the level of sound coming through the speakers.
If you are using external passive speakers, the power and volume for the speakers are drawn from the connected unit. Manuals are posted on your model support page. Consult the instruction manual of your portable player for specific information. Some units have an AVLS switch, where other units offer the AVLS setting in the menu of the portable player. NOTE: The procedure to turn the AVLS feature off varies by model. Although it is recommended to leave the AVLS setting on to protect the hearing of the listener, maximum volume cannot be achieved until the AVLS feature is turned Off. Some of the Sony® portable audio players are designed to limit the volume level with the Automatic Volume Limiter System (AVLS). Depending on the product, ducts at the bottom of speakers may be covered by seals. If headphones are connected, try disconnecting the headphones. If your device is connected using a cord, temporarily unplug the cord and then firmly reconnect it to the terminals of the connected device and the speaker. Move metallic objects away from the speaker if there is one. 
If your device is not connected to a Bluetooth device, try pairing the connected device with the unit once more. When music files on your computer are playing back, check that the audio output settings of your computer, such as Bluetooth® settings, etc., are set correctly. If the connected device has functions or modes, set them to the appropriate ones. 
Check if the connected device is playing back a music file. Check that both the connected device and the speaker are turned on and the volume is turned up. To troubleshoot the issue, check the following. IMPORTANT: If model-specific information is needed to complete these steps, refer to the instructions supplied with the product.
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