Headphone Jack not working

[Daltonb]

So I went on vacation to Florida this week, I come back, start up my iMac, plug my headphones in, only to hear audio to come out of my iMac's speakers. I called apple, and I did the whole restart and hold down command, option, P and R and still nothing, I have apple care and he said I should talk to small dog. I called Small Dog gave them a description and said they would have to send it to apple because my logic board might have issues. My question is this...

Since my normal headphones don't work, would a pair of USB headphones work as a quick fix until I could send it away?

 

[Daltonb]

Any help?

 

[frankblundt]

if the sound is coming through to the speakers ok, then it would seem to be an issue with the headphone jack or the headphones, in which case USB headphones should be fine

 

[alphaod]

Get some compressed air, and burst a few shots into the headphone jack; it possible gunk built up inside.