Hello, I bought a Lightning to VGA cable from a seller on Amazon. It is a genuine apple cable, complete with box, warranty info, other paperwork, etc. I'm plugging it into a nice projector. However, the connection felt like the clearances were pretty tight. I could not get the RGYB mix to completely display. I could only get green and yellows, or yellows and blues. I only got yellow unless I wiggled it a certain way and gently set it down;then I got the other colors together. I never really got the red color channel, so it was only a passable presentation. 1) Is it almost certainly the apple adapter, or could it be the cable I was using? Maybe I need to tighten the heck out of it? I will try another classroom this evening; I'm only there once a week. 2) Would Apple accept it if I took it to my local apple store, or does anyone know if I'd have to go back through Amazon? Thank you for any advice!