| Problem | Possible Cause | Recommended Solution | 
|---|---|---|
| A label format was sent to the printer but was not recognized. The DATA light does not flash. | The communication parameters are incorrect. | Check the printer driver or software communications settings (if applicable). | 
| If you are using serial communication, check the serial port settings. See Port Settings. | ||
| If you are using serial communication, make sure that you are using a null modem cable or a null modem adapter. | ||
| Check the printer’s handshake protocol setting. The setting used must match the one being used by the host computer. See Port Settings. | ||
| If a printer driver is used, check the driver communication settings for your connection. Reinstall the printer driver. See Installing the Drivers. | ||
| A label format was sent to the printer. Several labels print, then the printer skips, misplaces, misses, or distorts the image on the label. | The serial communication settings are incorrect. | Ensure that the flow control settings match. | 
| Check the communication cable length. See General Specifications for requirements. | ||
| Check the printer driver or software communications settings (if applicable). | ||
| A label format was sent to the printer but was not recognized. The DATA light flashes but no printing occurs. | The prefix and delimiter characters set in the printer do not match the ones in the label format. | Verify the prefix and delimiter characters. See Control Character and Delimiter Character in Language Settings. | 
| Incorrect data is being sent to the printer. | Check the communication settings on the computer. Ensure that they match the printer settings. | |
| If the problem continues, check the label format. |