I have a HP Photosmart C4280 All-In-One printer that was purchased with my MacBook. I can print from my computer fine with it, but when i click scan, it will say USB Not Connected...I am not an idiot, everything is securely fastened. I went into SYstem Preferences and deleted it from the "printers" menu then added it again, and nothing changed. Anyone else having this problem or heard of what to do? Thanks!