Hello, my Photobooth isn't working. I start it up, and everything seems to be working fine -- my old pictures are showing in the tray, the green light on my computer is on. Except, Photobooth shows a black screen. I can take pictures and vids, but nothing shows. There's no camera with a slash. Also, I tried View<Reset Effect, and a couple times an oddly colored and fractured picture of me would show on screen. I have no clue what's going on. Help, please?