There are a few different ways how to fix headphone jack, and the best option for you will depend on the severity of the problem. If the issue is simply that the jack is loose, you can try tightening it with a small screwdriver. If the headphone jack problem is more serious, you may need to replace the entire jack.

Here are some steps you can follow to fix your headphone jack:
- Clean the headphone jack with an interdental toothbrush dipped in 70% isopropyl alcohol.
- Adjust the headphone plug.
- Repair the headphone jack by replacing it.