Computer skipping lines when printing

SOURCE: When printing pictures, there are faint white vertical lines on

Cleaning usually doesn't help that printhead much. A new one QY6-0049-000 is around $40.00. You remove by lifting the gray handle on the left after removing all the inks.

SOURCE: Using a Canon pixma ip4000 and when printing

You need to replace the printhead, QY6-0049-000. They get plugged and cannot be cleaned. around $40.00

SOURCE: canon Pixma IP4200 started printing regular

Hello first of all are you technical
I have taken the printer head out
boil some water and pour in a cup
take off the 2 screws at the bottom
gentley open the head from the casing**** note if you not gentley it wil brake and U can through the hole head away
then let the white block lie in in the water until the water is cold the trough that out and repeat this step.Boil water again....Wait for 4 to 5 minutes to pass..... then use high copressed air and blow from the underneth so that the presure will force the **** out on the white block side also force some hot water from the litle sifes at the top down and make sure that holes are open
replace the ruber perfectley and the head pease an make sure every thing is propeley dry.Replase the scews .and put it back in the printer.Remember it is also a very filthey and inkey job.Good luck

SOURCE: printer skips line while printing. tried

Please click on the link below :
https://docs.google.com/ and follow the steps given .

SOURCE: My printer is skipping lines and sometimes printing only the top or bottom of a line.

You will need to replace the printhead or buy another machine.