Please check the following:
 

• Make sure that the cassette tape is not empty.
  If there are vertical stripes on the ribbon, replace the cassette tape with a new one.


• Make sure the cassette tape is firmly inserted inside the tape compartment.


• If the batteries are weak or the wrong power adapter is used, the machine does not print.
  
  If you are using batteries:
  Replace all of them with six "AA" batteries. Follow the pictures in the batteries compartment on positioning the "+" POSITIVE end of the batteries.
  
  If you are using an AC power adapter:
  Check the rating of the adapter. The label on the adapter should list the OUTPUT as 7VDC 1.2A. The label should also indicate the "+" POSITIVE and the "-" NEGATIVE contacts of the adapter plug. The outside surface of tip at the end of the plug should be "+" POSITIVE and the inside contact should be "-" NEGATIVE. Using a wrong adapter can damage the machine internally and void the warranty. The recommended adapter for this machine is the AD30.