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Color prints fine.  But B&W won't print anything but a blank page.  Have tried two new cartridges, multiple cleanings and deep cleanings, one manual cleaning of contacts, and a complete power off and unplug.  Still nothing but a blank page.  Help?

My printer ran out of ink on several cartridges at almost the same time.  I replaced them all, including the 5 PGBK cartridge.  Color print works fine, and does its best with black.  However, when printing a black and white copy from either the panel...