Canon Pixma 320 Allinone Prints blue line across prints though test pages are fine and ink is new

Sounds like printing nozzle problems, or the waste ink absorber is saturated. There is step by step guide to cleaning it at
http://www.wikihow.com/Clean-the-Canon-Pixma-IP1000-Printer-Waste-Ink-Absorber

Did you try a test print. Most printers have a option to set the ink color, this is done when your computer asks you if you want to print. Look for an options tab and search for ink color options pick black only and try a test print. The test print is done on printer set up. If all else fails try the manual it usually has a troubleshoot section. Oh yes make sure you have the correct usb port some are configured at a lower level ( mine has 2 different ones a 2.0 and a 3.0 the 3.0 is blue when you look inside of it) my 2.0 port wouldn't set up my printer I had to use the 3.0 port. Hope it helps you some!

Sounds like it's congealed ink on the print head. You can buy cleaning kits and do it your self. Relatively in expensive compared to leaving it into the shop.

Hi

Rub the printhead in a plain paper with alcohol until ink flows and then run the print nozzle for 2-3 times.

Let me know if you need more help

try to change the color ink. horizontal banding (the pink or other color lines appearing means horizontal banding) when there is a problem on one of the heating element of the printer head. since almost all canon printers have head built in the inks, replacing the faulty ink will solve the problem. if not then the controller of printhead on the carriage and mainboard needs to be checked.

My Canon Primax ip4000 has stopped printing blue. I've tried deep cleaning and when I print a test page the blue 6c does not appear. Any ideas what the problem could be?

You need a new printhead, QY6-0049-000 around $40.00. Your printhead has worn out or plugged nozzles and cleaning won't help.

Hi,

I had a similar problem. Pages in blue, but nozzle check in black. Tried what you tried. Changed the ink ($). Still no change. Then tried the maintenance option to clean the bottom plate. And now it is working. Go figure.

Replacing the print head
The print head may need replacing if, after all print head and ink tank troubleshooting has been performed:

• The nozzle test appears broken or to have horizontal white streaks.
  
• One or more of the colors is missing from the Nozzle Test.
  
• The colors are incorrect on the Nozzle Test.
  
• A print head error is indicated on the unit.
  
• The printer powers off when the print head is installed.

I hope it helps!!!

Hi, I have question?
The ink that yuo are change are original epson cartidge ink?If yes , try to head cleaning twice and then nozzle check ,then the result of test print are soild in color are good , the unclean head having plenty spaces within the color in test print.