I purchased and installed a new Pixma MX922 printer and connected it wirelessly to my home network.  Went through install, put in the ink cartridges (all light up) and attempted the print head alignment -- page came out blank.  I attempted this several times with sheets provided, same result.  Then tried the manual alignment, same result, blank page.  I have verified that the cartridges do not have any plastic left covering dispenser or air supply. I looked inside to make sure no protective covers remained (somewhere specific I should look?).  I installed the software on a laptop and connected and attempted to print, only a blank page.  I also connected via USB cable and ran Diagnose tool, didn't find any problems.  The feedback on this model is favorable, what am I missing?