I just got my Vita used from Gamestop. I have the warranty, so I'm not worried, but the system will randomly say that the game card has been removed. It's done it a couple times now while I have the system in stand by (which is what I assume it's called when you just hit the power button). I'll turn it on and it will say the game card has been removed. Today, I was like 9 waves in to a Call of Duty: Black Ops Declassified mission, and the darn thing popped up with the error. The first time it's done it while I've been actually playing it. I didn't have time to put in the other game I have and play, but is there something else it could be in the system itself, instead of the game card? As I said, if I have to take the system back and swap it so be it, or swap the game. Just looking for what is the most likely culprit. Thanks!