hi @ron6403,
Do you mean no sound from the headphones socket or from the phone speaker?
There is an internal contact in the phone’s headphone socket that is operated when a headphone’s plug is inserted, which signals the OS to switch the audio output away from the phone’s speaker to the external speaker. The OS also turns on the icon.
It appears as though it is stuck in the operated position
Try ''gently'' inserting and removing the headphones jack plug into the phone’s headphones’ socket a few times to see if this releases the contact. Also try ''gently'' wiggling the plug whilst it is in the socket.
If still no good then the socket will have to be replaced as it cannot be repaired.
Here’s the ifixit [guide|33369] guide which will help you to gain access to the headphones socket.