Hey i have an hp photosmart C4200 series all-in-one printer, and im doing a big college report at BC university, i've never used my scanner part of my printer, but now i NEED to and theres a problem. Whenever i place a picture to be scanned onto my computer and hit scan, a couple seconds later, on my little screen on my printer that says copy color, copy black-and-white, and scan, it says error, USB not connected, i've checked both my usb connections and even switched the usb slot, but no luck, i really need help now as fast as possible!!!!!!!! It's a really big essay worth at least 30% of my final grade. PLEASE POST NOW!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!