When I plug my headphones into the headphone jack there is no sound, even when the volume is turned up.

Gus- If your phone is plugged in to charge but does not recognize a connection then the first thing I would do is test the chord. Either use your chord to try charging another device or use a different chord to charge your device. If your chord is working then my second suggestion would be to clean out the charging port with compressed air. If your chord is good and your port is clean then I would say you might need to replace your charging port. Take a look at the LG Tribute Troubleshooting page.