Is blown iphone 4 headphone output fixable??

Hi, I was testing out a diy preamplifier circuit I made using my iphone 4's headphone output. However I think something was connected wrong which shorted the 12dc power supply across the headphone output. The phone automatically restarted but now the headphone output doesn't work at all. The internal speakers and bluetooth output both work fine though. I was just wondering if there was a way to fix this without replacing the entire logic board.
Thanks