Welcome to Justanswer.com, my name is ***** ***** I will do my best to assist you.
We need to try a couple of things, a printhead cleaning.. Then a printhead alignment.
And then we need to check the printer driver and make sure its in greyscale.. So I can help you carry out those steps I need to know the following info.
To get started, I need to know what type of computer you are using, a Windows XP, Vista, Windows 7, Windows 8, Windows 10 or a Mac.If its a Mac, please check the OSX version as follows, Click the apple sign at the top left of your screen, then click about this mac. And then where it says version, send that to me as a reply.