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OfficeJjet 5740
Microsoft Windows 10 (32-bit)

Used HP Print and Scan Doctor 5.2.1 to print a test page and noticed a few white lines in the first column of the black ink box.  Ran the option to clean the cartridges.  It was still running (displayed "Cleaning cartridges . . .") after 15 minutes.  Assuming it wasn't suppose to take that long, I went ahead and printed another test page - - -  now there is hardly any black in printing in the first column of the black box AND only light gray printing in the alignment lines.  All other colors are printing fine and the Scan Doctor indicates that the black cartridge is about 1/3 full.  I decided to try and clean the cartridges again and the "Cleaning cartridges..." message has been displaying for the past hour.  This does not sound right. 

 

Any help would be appreciated.  Thanks very much, David

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