If you can’t hear music or phone calls through your headphones, you might be worried that your iPhone’s headphone jack is broken. And maybe it is. If no audio plays through your headphones, that’s a sign of a potential hardware problem, but it’s not the only possible culprit.

Before you head to the Apple Store for a repair, try the following steps. They’ll help you figure out if your iPhone’s headphone jack is actually broken, or if it’s something else that you can fix yourself, for free.

Try a different pair of headphones first. The first thing you should do when trying to fix a broken iPhone headphone jack is to confirm that the problem is with your headphone jack, and not with the headphones themselves. It would be better if it were the headphones: it’s usually cheaper to replace them.

The easiest way to do this is to grab a new set of headphones (ones that you already know work well) and plug them into your iPhone. Try listening to music, making phone calls, and using Siri (if the new headphones have a microphone). If everything works fine, the problem is with your headphones, not the connection.