This same thing is happening to my printer... Lexmark genesis s815. All pages are printing blank. The ink is showing as full on the screen but it is not being delivered to print the pages... I am extremely fed up now. I have installed everything properly, this is my third Lexmark printer, so I know I have done everything correct.

Did it ever print properly?

If so, maybe the printhead is dried up. Try wetting a paper towel, then wringing it out as much as you can. Fold it into a small square (say, 3" x 3"), sit it on the table, and then touch the printhead nozzles to it. Wipe slightly to clean the nozzles.

If it never printed, then maybe the printhead is defective.

Good luck,
WallyH