Check that the cartridges are firmly in place. Then check for a blockage where the ink comes out. Maybe blow in where they go to clear anything out of your way. Hopefully one of those helps. The printer we had at the bakery I used to work in hated me. On my last day I had 4 image cakes and the darn thing quit putting out color.
Check your print settings. Make sure that you are printing on a high enough quality setting and not printing in draft mode?
You might need to change the print settings to photo from text. My epson has settings like draft, text, photo... Hope this helps.