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My iP4300 is missing exactly the same lines of text using the PGBK cartridge no matter what I have tried right down to missing exactly the same top half of one line of text and the bottom half of anotherr. Aside from missing lines there is no smearin...

ThisiP4300  printer has worked well for 6 years. Recently it has started to miss lines of black text when print quality set to Standard, my normal setting.  When quality is set to High all lines are printing.  If I print several copies of the same pa...