My black ink in my PIXMA MP760 printer will not print. I have gone throuh the maintenance process for cleaning and deep cleaning the heads and it still will not print any black whether it is text or graphic. The colours print ok

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.

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.

CANON MP780 BLACK DOES NOT PRINT

This is what works for me. Try at your own risk. I cleaned both areas.

CLEAN PRINTHEAD:

Perform a nozzle check using the Canon software under "maintenance." If the nozzle check prints successfully, the problem is most likely not with the printhead. Otherwise, 1) Lift up the lever above the ink cartridges. Take the ink cartridges out. Put them in a plastic zip lock bag. 2) The container in which the ink cartridges sit is removable. The container is inside the moving mechanism. The container is the printhead. Tilt it slightly and pull up. This should come out easily. 3) There are round pads under which the ink cartridges sit in the printhead you removed. The large one is black. On the underside of the printhead are small slits. The **** separated from the others is black. Fill a syringe with Windex. a. Run warm water over the printhead until no more ink comes out. b. Fill the areas where the round pads are with Windex. c. Set the printhead on some paper towels. The liquid will soak through and come out the underside along with the ink. Repeat steps a-c until no more ink comes out, but at least 10 times. 4) Let the print head sit and dry for two hours. Put everything back in the printer. Unplug the printer. Plug in the printer. Turn the printer off. Turn the printer on. Do a clean cycle.

CLEAN PURGE MECHANISM:

You will need a light. 1) Unplug the printer and move the printhead all the way to the left. On the far right are two rectangular basins. The smaller one is black. Take your fingernail or a tweezers and lift out the sponge pad (do not drop it). Soak the sponge pad in Windex until it turns white. Plug in the printer. 2) Fill a syringe with Windex. a. Fill the basin with liquid. b. Let it soak for 5 minutes. c. Turn the printer off. d. Turn the printer on. Repeat steps a-d until you see a small hole in the basin. e. Put the syringe over the hole and fill the basin, pushing the liquid into the hole. f. Let it soak for 5 minutes. g. Turn the printer off. h. Turn the printer on. Repeat steps e-h 5 to 10 times. 3) Put the sponge pad back in using your fingers (do not drop it). Unplug the printer. Plug in the printer. Turn the printer off. Turn the printer on. Do a clean cycle.

Go to "start menu", then "settings", then "printers and faxes". Right click o your printer, then click on "properties". A window with numerous tabs will open. Go to "maintenance". Click on "deep cleaning" or "cleaning". That will clean the print head that is in your printer, and the colors should come out right.
If the printer hasn't been working for a while, you will need to repeat the cleaning process several times in order to get a satisfying result.
Do bare in mind that this process uses a lot of your ink.

Cannon recommend a cleaning process called deep head cleaning

1. Open the Printers folder.
   
   - For Windows XP select 'Start', 'Control Panel', 'Printers and Other Hardware', and 'Printers and Faxes'.
   - For Windows versions other than Windows XP select 'Start', 'Settings', and 'Printers'.
   
   
2. Right-click the printer icon and select 'Properties'.
   
   
   
   
3. Click the Maintenance tab, and then click the 'Deep Cleaning' icon.
   
   
   
   
   
4. Select the ink tank color(s) for deep cleaning ('All Colors', 'Black', or 'Color').
   
   
   
   
   
5. Confirm the message, and then click the 'Execute' button.
   
   
6. The Power lamp will blink and print head deep cleaning will start. Deep cleaning completes when the Power lamp stops blinking and lights. (It will take about a minute for the Power lamp to stop blinking and light solid.)
   
   
7. Print a Nozzle Check Pattern by holding down the <Resume> on the printer until the Power light flashes twice to determine if further cleaning is necessary. Up to three deep cleanings may be necessary to determine if the print head is working properly

Hi ...

I would suggest you try and clean the print head and that should resolve the problem. Follow the below steps to clean the print head:

Perform a Cleaning of the print head:
Caution: Cleaning consumes a certain amount of ink. Perform Cleaning only when necessary.
Note: The pattern varies depending on the printer and version of Windows being used.

1. Click 'Cleaning' to perform print head cleaning from the Pattern Check window and proceed to step 3 of the print head cleaning instructions. If the Pattern Check window is closed, skip this step and proceed to step 2.
   
   
   
   
   
2. To perform a print head cleaning from the Maintenance window, click 'Cleaning'.
   
   
   
   
3. When the Print Head Cleaning window is displayed, select the target ink group for 'Cleaning'.
   
   
   Note: When performing Cleaning for all colors, check 'All Colors'.
   
   
   
   
   Note: When performing Cleaning for Black only, deselect 'All Colors' and check 'Black'.
   
   
   
   
   Note: When performing Cleaning for Color only, deselect 'All Colors', and check 'Color'.
   
   
   
   
4. After selecting the target ink group click 'Execute' to perform the cleaning of the print head nozzles.
   
   
   
   
5. When the confirming message is displayed, check the contents, and click 'OK'.
   
   
   Caution: Although the Nozzle Check window is displayed, do not perform any other operations until Cleaning is completed.. Cleaning will take about 40 seconds.
   
   
   
6. Print a Nozzle Check Pattern and examine.
   
   
7. Perform Cleaning again if necessary.
   
   
   Memo: If the pattern is still abnormal after two Cleanings, perform up to two Deep Cleanings.
   
   
   

Perform Deep Cleaning of the print head
Caution: Deep Cleaning consumes a larger amount of ink than normal Cleaning. Perform Deep Cleanings only when necessary.

1. In the Maintenance window, click 'Deep Cleaning'.
   
   
   
   
   Note: The layout varies depending on the printer and version of Windows you are using.
   
   
2. When the Deep Cleaning window is displayed, select the target ink group for Deep Cleaning.
   
   
   
   
   Note: When performing Cleaning for all colors, check 'All Colors'.
   
   
   
   
   Note: When performing Cleaning for Black only, deselect 'All Colors' and check 'Black'.
   
   
   
   
   Note: When performing Cleaning for Color only, deselect 'All Colors', and check 'Color'.
   
   
   
   
3. Click 'Execute'.
   
   
   
   Memo: By clicking 'Initial Check Items' before clicking 'Print Check Pattern', you can see the specific confirmation items in Nozzle Check.
   
   
4. When the confirming message is displayed, click 'OK'. (The Power lamp will blink green and Deep Cleaning starts. The blink stops when Deep Cleaning is over.)
   
   
5. When Deep Cleaning starts, check the contents, and click 'OK'.
   
   
   Caution: To prevent interruption of the Deep Cleaning process, do not perform any other operations until Deep Cleaning is completed. When the operation of the printer is stopped, Deep Cleaning is completed. Deep Cleaning will take about 75 seconds.
   
   
   
6. Print Nozzle Check again.
   
   
   Note: If the printed pattern is still not normal, perform steps 1 through 4 of the Deep Cleaning process one additional time.
   
   
   Caution: If after two Deep Cleanings the Nozzle Check Pattern is still not normal, turn the printer off and let it sit for 24 hours or more before attempting another Deep Cleaning again. The wait time may allow dried ink in clogged print head nozzles to liquefy, and resolve the problem
   

If this does not resolve the problem, please reply back and we'll try the next step ...

Don't forget to vote if this helps ... Cheers :)

You can try to remove the print head and ink cartridges.
Soak the head in an ammonia10-20% solution with warm water for 30-45 min.
Dry the head completely and re-install.Now run your grid patter,
It sonds like(from the grid reference)that only the black is clogging.This is a pigmented ink and tend to dry if not used for months at a time.

Try cleaning the felt pads where the print head would rest when not printing. They get full of ink and cause more printing problems. I use water to clean them.Don't loose them, they are needed to keep the print head from drying out.

Print Nozzle Check Pattern

1. Press the Open button to open the output tray.
   
   
   
   
2. Load letter-sized plain paper in the auto sheet feeder (ASF) or the cassette.
   
   
3. Display the Maintenance screen on the printer.
   
   
4. Press the up or down cursor to select [Nozzle check], then press the <OK>.
   
   
   
   
5. Press the up or down cursor to select [Yes], then press <OK>. (The nozzle check pattern is printed.)
   
   
6. Confirm the nozzle check pattern.
   

< 1 > The normal nozzle check pattern
< 2 > The abnormal nozzle check pattern

< 3 > Some black ink lines are broken.

< 4 > White lines are present in the color ink pattern.

< 5 > Both black and color inks are not present.
Note:

1. When all patterns are printed normally, press the up / down cursor button to select "All A" and press the OK button.
   
   
2. When any patterns are printed abnormally, press the up / down cursor button to select "Also B" and press the OK button.
   

Print Head Cleaning:

1. Display the Maintenance screen on the printer.
   
   
2. Press the up or down cursor to select [Cleaning], then press <OK>.
   
   
   
   
3. Press the up or down cursor to select [Yes], then press <OK> to start print head cleaning.
   
   Note:
   Do not do any other operations until print head cleaning is completed.
   
   
   
4. Print the nozzle check pattern and check the print head status.
   

Deep (Print Head) cleaning:

1. Display the Maintenance screen.
   
   
2. Press the up or down cursor to select [Deep cleaning], then press <OK>.
   
   
   
   
3. Press the up or down cursor to select [Yes], then press <OK> to start print head deep cleaning.
   
   Note:
   Do not do any other operations until print head deep cleaning is completed.
   
   
   
4. Print the nozzle check pattern and check the print head status.
   
   Note:
   Ifthe printed result does not improve even after doing print head deepcleaning, turn off the printer. Then, after 24 hours or later, do printhead deep cleaning again. (After a given time interval, ink coulddissolve itself, resulting in ink unclogging.
   
   

Take the cartridges out and also the printhead and set the nozzle of the printhead on a 5-sheet pile of kitchen paper that was make wet in the middle with some lukewarm demineralized water ( water for an iron )there is not much necessary if there are clogged nozzles deep inside the printhead buy cartridge flush different methode for printers to find
How To EASILY Unclog Ink Jet Print Heads