Currently Being ModeratedNov 20, 2012 7:44 AM (in response to masond)
Not sure exactly. The motion from running could be wiggling something loose. Do you use the headphones with remote and mic? If so, those could be getting moisture on them, causing some short circuiting that leads to odd behavior such as what you are experiencing.
Currently Being ModeratedNov 20, 2012 9:00 AM (in response to planb77)
Thanks for the thought.
I'm using the Apple earphones that came with it. Some sixth-gen owners say that a software update causes the 6th-gen nanos to shut off if the earphones aren't plugged all the way in. Is it possible that wear-and-tear inside the earphone port could make a space that would make an old 1st-gen nano shut down? (Though it's not clear to me whether the 6th-gens are turning off or shutting down—mine is completely shutting down.)
Is it also possible that a worn-out click-wheel could cause the nano to shut down?
To develop a fix, I need to know what would tell an old nano to shut down completely.
Currently Being ModeratedNov 20, 2012 9:27 AM (in response to planb77)
I tried another set of earphones. Lasted, perhaps, twenty-five additional yards. Anecdotally, it's not the earphones.
Would its perception of a loose connection inside the earphone port cause the nano to shut down? (That is: is the device programmed to do this?)
Currently Being ModeratedNov 20, 2012 9:32 AM (in response to masond)
Yes. It's a feature of the Nano. When it no longer detects a headset, it pauses playback. However, you said a complete shutdown, so that would actually rule that possibility out.
Perhaps the battery's connection to the logic board wiggles when running causing the iPod to lose power. I'm not 100% sure as there are still a few other possibilities, but I'm still leaning towards something getting jiggled around.