nano 6g broken headphone jack repair :(

hi,

i have a iPod nano 6g.
2 weeks ago the headphone jack broke, so I got a replacement jack on amazon.
After replacing the jack, the buttons work as well as everything else but the SOUND.
It sounds fuzzy and if you listen carefully you hear a quiet melody in the background.

What do you think could have gone wrong?

I already replaced the isolation tape in the iPod.

Could I have broken the new headphone jack while installing?

im addicted to music so please help me

It sounds like a poorly shielded replacement jack or it's not grounded properly. Was the replacement jack an actual Apple part or a similar replacement? Also, you might wish to look at the take apart instructions for the Nano 6th Generation at iFixit: The free repair manual.

yeah, i think it probably is a 3rd party product, ill try to replace the insulation tape maybe that will help thanks though