Ensure the the ribbon is not broken
Verify that the correct power supply is being used
Ensure that you have not reached the end of the ribbon
Ensure that you have the ribbon loaded correctly (ribbon should run over top of the spools)
Ensure that the ribbon is a genuine Evolis ribbon
Check to make sure that the Printer driver is set correctly for the ribbon that is loaded
If the above steps do not work, verify the ribbon setting manually by again opening Printing Preferences, then clicking on the Tools tab.
Then click on Dialog with printer
Type in the Command Rr and press Enter (the command is case sensitive and contains no spaces).
The answer should be the ribbon type you just changed to in the driver, and should correspond to the ribbon actually installed in the printer.
If the answer is different you can type in the command: Pr;(ribbon type) and press Enter to set it manually, for example:
Pr;ymcko for an R3011
Pr;ymckok for an R3314
Pr;k for an R2011