I'm hoping that someone out there can help me. I installed a set of inexpensive headrest monitors in my vehicle. The split of the signal cause the picture to roll to the two monitors, so I added a video amplifier to the line. When I tested it (without the car running) everything seemed to work great . I went ahead and finished the install and have found out that when the car is running the picture rolls on the monitors -- works fine if I am running on Aux power (just like when I tested it). Can't figure out why I have the problem or how to fix it. The Video Amp I purchased does not have a fine tune adjustment -- maybe a different Video Amp would work better? I welcome any help/advise you can give. Thanks.