Got a new Fender American Jazz Deluxe V 2 months ago. Been pretty happy with it until last week I noticed a distinct hum that goes away whenever I touch anything metal on the bass. It seems to be coming from the bridge pickup only. The only thing that may have caused it that I can think of is that while practicing, I stepped on my cord and yanked it out of the input jack. I didn't go into it due to warranty concerns. Any ideas out there? Also, any suggestions as to aftermarket pickups, bridges, strings, etc?