It is a SBS 2011 domain for what it is worth. The HP Smart app on the iPad see all network printers (there are about 20 of them). Absolutely no problem printing to OfficeJet 8600 but it just won't print to a LaserJet 402dne (it is a monochrome lasser. It goes through all the paces, says it is printing but nothing comes out the printer. No indication that anything makes it to the printer.
Both printers have Bonjour on them. The 402dne must need a little something else to get it to print. Any ideas?