I installed a new volume/ power button flex on the iPod. I had to isolate the battery so I desoldered the + connection and when I soldered it back on the iPod worked fine except the headphone jack doesn't work unless it's full blast and it sounds all distorted and scratchy? So I took it apart again to check the HPJ flex cable and made sure it had a secure connection, but after reassembly it still does the same thing? I'm hoping the headphone jack just needs to be replaced. Anyone have the same problem?