Well, here it is almost 7 years since the original post, and the solution to the problem just keeps on giving and saving people thousands of dollars. Around seven years ago I bought my very low mile single owner 2007 Sienna Limited, used. It came with all the bells an whistles, most of which I never use, including the rear DVD. I love the JBL sound system, for a stock system it sounds great and I'm one of those people that still listen to CDs and the four disc changer works great and has never had an issue. Anyway, the issue of the rapid intermittent sound cutting in and out came up, and I googled the problem and found nothing. I mentioned it to my computer genius son and he almost instantly found this link. Next morning, after a month or so of no tunes, it took less than 5 minutes to lower the rear DVD housing, unplug the unit, turn on the ignition and radio and YAAAAYYY! It works! Then tried turning off the ignition and reconnecting the DVD and the problem re-occurred. So, no rear DVD anymore. Which I never use anyway! THANKS THANKS THANKS FOR THIS PAGE AND SOLUTION!!!