Battery replaced: Headphone jack stopped working

Hi everyone,

I recently replaced the battery of my iPhone SE and the headphone jack stopped working. When I am playing music from Spotify/Youtube and plug in my earphones the music continues playing on the speakers and there is no sound through the earphones.

I did the following troubleshooting:

• Cleaned out the headphone jack (with compressed air, a piece of cotton and a little bit of rubbing alcohol)
• Tried different earphones (double checked and made sure they worked on a iPhone SE and iPhone 6+)
• Made a backup and did a reset to factory settings
• Reinstalled iOS via iTunes
• Replaced the lightning connector assembly, including headphone jack and microphone with a working one
• Ordered a new battery and installed it in a different (working) iPhone SE, in case it had anything to do with the logic board of my iPhone—now I have 2 iPhones with a non functioning headphone jack

So, I tried all the above and nothing works. What am I missing here?

Any help would be appreciated!

Cheers,

Tom

*I repair iPhones and MacBooks frequently, so I am very careful and know what tools to use and how to use them.

I bought a replacement dock-connector, installed it and now everything works again!