Did all of these for Ipod Nano wheel type with no change in behavior (internal device-mounted speakers play whether headphones are connected or not, and when connected, headphones ALSO carry sound in addition to internal speakers). Replaced and changed out multiple headphone and earbud units, all that seem to work with everything else I have, and I am getting at the short end of my rope at this point. Not sure what to do, but I surely am not paying someone 40 bucks or more to toy with ideas on it. I need some information to be sure, because I also know this one has not ever been wet, has been ejected properly, and has not been banged around (and in fact is in an armored case its entire after-purchase life). This has been a recent development that started suddenly with no warning, and the unit functions correctly in all other respects.