Question about Canon PIXMA MP780 All-In-One InkJet Printer

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Cannon Mp780 not printing yellow at all. Ink tanks are full.

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CANON MP780 DOES NOT PRINT

This is what works for me. Try at your own risk. You may need to clean 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 one 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.


#8

Posted on Jan 04, 2011

Testimonial: "Thanks, very neatly explained. Yellow 100% again, but doing a nozzle check the second blue & both magenta lines is light on top & dark at the bottom. "

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1 Answer

Cannon Pixma MP780 won't print. Just replaced black ink cartridge, do I have to replace all of them for it to print


Not normally but the black print head nozzles maybe blocked.
Inkjet printers need to be used frequently to prevent ink drying out and blocking 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 than replace the print head.

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Hi ...

Cannon Pixma MP780 have an absorber and this error is related to this absorber.

This printer has an ink absorber that takes in ink during the printing and print head cleaning processes. The cleaning process is necessary in order to keep the print head nozzles from becoming clogged. Over the life of the printer, the amount of ink that the ink absorber has absorbed is calculated by the printer. Eventually, after substantial use, the printer will enter an error condition when the ink absorber is nearly full. At this point, printing is still possible. Press the <Stop/Reset> button to cancel the error. You will still be able to print for a short period. To protect the printer from damage, you will not be able to print at all once the ink absorber is full.
Canon recommends having the printer serviced before the absorber becomes full. Replacing the ink absorber is a complicated and potentially messy procedure. Even if the ink absorber is successfully changed, the ink absorber counter must be reset.

I would suggest that you take your printer to the nearest cannon service centre and get it repaired.

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

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1 Answer

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Your MP780 printer has decided you have too much ink from the cleaning cycles in the absorbent pad inside the printer. Go to www.fixyour ownprinter.com and put "MP780 waste ink" into the search function. Follow the leads to find out how to clean the waste ink out and more important to find the code to reset the printer to get rid of the waste ink message.

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Or you can try a little ammonia. I used a cap full of ammonia in each side of the print head where the ink tanks go.
Put the print head in a can and let it set in the ammonia for 5-15 minutes then blot dry with paper towels and let stand until dry.
Then run the maint routines for the print head found under properties/maintance.

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1 Answer

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Waste Ink Tank Reset

1. Turn off printer
2. Hold down Resume button and press Power button.
3. Keep holding down Power button and let Resume button go.
4. Press Resume button 2 times then let BOTH buttons go.
5. Green lights will flash and then stop blinking.
6. When green lights are solid, press the Resume button 4 times.
7. Press the Power button and the printer should turn off, if not, press the Power button once more.
8. Your printer should respond as normal.

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe

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PIXMA MP780 "WRONG CARTRIDGE" MESSAGE?


PIXMA MP780 "WRONG CARTRIDGE" MESSAGE?
Here is what I did and it now works just fine.I turned off the printer and unplugged the power cord, and unplugged it from my computer. I then removed all the ink cartriges and removed the print Head I got some rubbing alcohol put it on some toilet paper and wiped down the back and bottom of the print head.Plugged everything back in and It now works better then ever.

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