Canon iP3000 Printer not working after using with OS X Lion
It appears that Apple does not provide a driver for this printer so it may be due to the fact of an outdated driver


  It now will not print on any printer


The fact that you say that however leads me to believe that you may have an issue with the USB port in your Mac, if you can try it in all the USB ports on your Mac and see if you still have the same issue. If you do then you may need to contact an Apple Genius to see if they are aware of this issue and a resolution to it