One color is not printing properly ( magenta ) I've done all the maintenance repeatedly, cleanings, deep cleanings, alignments.. bought all new canon cartridges, still magenta is printing in wide stripes of magenta printing-magenta not printing. What can cause this? Never had this problem before

Did nozzle check show cyan and magenta lines?

Inkjet printers need to be used frequently to prevent inkdrying out in the print head nozzles.
If the print head cleaning maintenance routine does not clear the blockages,then print head needs replacing, but it may be expensive.
It may be more cost effective to buy a later model and better printer thanreplace the print head.

Click Start, Printers and Faxes (or Printers and Devices in Windows 7), Right click on your printer (Pixma iP1000), click Properties.

Go to the Maintenance Tab, do a deep cleaning (more than once if it's still printing the missing color). Also do a Bottom Plate Cleaning if it still doesn't work.

You can sometimes buy cleaning cartridges that contain fluid designed to clean nozzles. See if they exist for your model.

You need to conduct the following steps:
Printing the Nozzle Check Pattern
The nozzle check pattern shows if each print head nozzle is operating properly.

You can also print the nozzle check pattern from your computer.

1. Load A4- or letter-size plain paper in the Auto Sheet Feeder (ASF) or cassette.
2. Press <Feed Switch> button to select the paper source.
3. In either COPY, PHOTO, or FILM menu screen, press <Menu> button.
4. Press the left or right arrow to select [Maintenance/Settings], then press <OK>.
5. Use left or right arrow to select [Maintenance] and press <OK>.
6. Use up or down arrow to select [Nozzle Check] and press <OK>.
7. When prompted to print a nozzle check pattern, use the up arrow to select [Yes] and then press <OK>.
   The machine prints a nozzle check pattern

Print Head Cleaning / Head Refreshing
If the printed nozzle check pattern is broken, missing, or a specific color is not printed, clean the print head.
MEMO:
a. Cleaning the print head consumes a small amount of ink. Cleaning too often reduces the amount of ink in the ink tanks.
b. Print head cleaning is performed when you connect the power cord. Your machine may perform print head cleaning periodically to avoid clogging.

1. In either COPY, PHOTO, or FILM menu screen, press <Menu> button.
2. Press the left or right arrow to select [Maintenance/Settings], then press <OK>.
3. Use left or right arrow to select [Maintenance] and press <OK>.
4. Use up or down arrow to select [Print Head Cleaning] or [Head Deep Cleaning] as necessary and then press <OK>.

When prompted to clean the print head, use the up arrow to select [Yes and then press <OK>.

IMPORTANT:
If normal print head cleaning does not improve print quality, perform deep print head cleaning.
Print Head Alignment in Windows
If colors mix or streaks appear in the nozzle check pattern, perform the print head alignment.
The print head alignment can be performed either automatically or manually.
If the automatic print head alignment does not resolve the problem, perform the print head alignment manually.

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The other week I had the black print head clog up, requiring daily nozzle deep cleaning [a normal 'ocassional' maintenance function]. Thought I needed a new Print head, so anything worth a try.
I loaded up an old black cartridge [I load all my own......always have] with Isopropyl Alcohol and ran deep clean on that cartridge a couple of times, then repeat printed [6 times] a page full of the number 8 in about half inch character size, to get the alcohol through the nozzles. then Deep cleaned again 3 times, to wash it through the print head.

I reloaded the normal ink filled cartridge and ran the '8' page again till I got good black output. It has now been working without problem, daily, for over a week. Clearly if it's a Magenta only problem, the cleaning as described above would be a bit different, as the magenta is one of 4 colour cartridges.
My printer does quite a lot of work, and was bought at least a couple of years ago, being used daily for alpha numeric and photo printing work. This was the first difficulty I experienced with it.
Hope the above might help.Ken

Do a deep clean on the printer.

Done from the printer setup.

widows is done from start, printers and faxes, click on your printer.
Should bring up window for setup.
Look for cleaning section.

In both cases be sure using correct ink. Use of generic ink can lead to leakage of catrridge seats do to crossion from inferrior ink quality (per Cannon). Be sure ink in proper locations - see manual. Run the maintenance proceedures: cleaning then print nozzle pattern. If all colors are not proper after two or three cleanings, perform deep cleaning. Print nozzle pattern after each cleaning. This should clear up problem. If not, print head may need replacement.

1. Get compressed air
2. Run Printhead under HOT water, do not worry about contacts getting slightly wet.

3. Blow compressed air with straw attachment into screens where the cartridge nozzle sits on printhead. then let it sit and dry.

4. reinstall print test page

5. if this fails open paint/photoshop and print a page of the color that is not printing correctly. rinse and repeat until colors flow freely.

I have several ip4300s and I have yet to give up the ghost on a printer with a clog ujsing this method.

Hello, what I ment was, how to print more than one off the printer not off the computer!