Headphone jack issues

Although headphones jacks are convient. They are very delicate as well. It take very little pressure agaist the jack when plugged in to bend the pins inside the jack that makes the connection. Then they get temermental. Generally the only recourse is to replace the headphonejack in the unit. better left to the techs. replacing can be tricky. But just to make sure you say you have tried other units. Here is something that works once in a great while. Unplug the unit dip the headphone jack {the tip on the headphones} in rubbing alchol insert it in the jack on the unit and spin it repeat several times let alchol evaporate then stick jack back in unit an spin again. Plug unit back in and see if it is better or the same.