Hello. My name is***** can help you with your question.
When you install the ribbon, make sure the ribbon goes through the 2 guides on either side and that it can move between them freely. It's very easy to install the ribbon and not have it fall between these clips if this happens, the ribbon will not be able to move and the type will become faint, and eventually you will see that all. Please let me know if this helps or if you still have questions and I will provide you whatever help you need.