I work from a MacBook Air and have had no trouble printing until just recently. Pages are coming out blank. Changed the cartridges. Cleaned them. Ran test pages. All the colors print, but not the black. I am concerned that I might have changed something in the print dialogue box, but it isn't giving me much to gone on.
I check B & W; default settings; US letter.
Any ideas? I go back to work tomorrow and have so much to print.
Thank you