Hi Jeff,
I know this is an old thread, but I currently have the same exact problem with the GY-700, which is only about 2 years old. I’m wondering what the outcome was, and if there is in fact any fix at all? Did JVC even accept responsibility for it and what happened?
Did anyone else on this thread have any success? I LOVE the camera, but not the noise / hum being recorded…
Thanks everyone in advance.
Cheers,
Mark
https://www.smallbusinessvideo.com.au
https://www.facebook.com/smallbusinessvideo
(Melbourne, Australia)