Make sure that you use the same type of data cable and USB port that was used when the printer was installed. You cannot switch the type of data cable after installation.
Make sure that both ends of the data cable are connected. Replace a defective USB cable if needed.
There are 3 different causes to this problem:
Clean the printhead when:
Do the following to clean the printhead:
Run a cleaning card to clean debris from the inside of the printer and from the hopper rollers. The cleaning card can remove most contaminants from the printer. Run a cleaning card after every 250 cards processed by the printer, or every 6 months.