epson printer issues

I have a nearly 3 yr. old Epson stylus photo 820. A while ago, i printed nearly 50 pgs. of pdf text with it. It did so without issue. Immediately afterward, I tried printing something (I forget what), and it spit a blank page at me. It has spit nothing but blank pages at me since. I have put new cartridges in it and still nothing but blank pages. Color, black and white -- text or graphic, it doesn't matter. I am lost. Anyone in the community have a solution, or at least an idea? Further info, I print wirelessly over an airport express. Also, pages are blank coming either from my iMac or my wife's iBook. It does not make a difference if I disconnect and bring it up and wire it to the iMac and run print utility; still just blank pages. Thanks for any ideas.