Invisible printing I have re-downloaded the printer driver, cleaned the heads, and changed the ink cartridges, and it still won't print. It makes noises like it's printing, but spits out blank pages, like it was printing with invisible ink.

You have a blockage in the print head and/or feed line from the ink cartridge to the print head. One possible fix would be to make a pad of paper kitchen towel wet it and sit the print head on it overnight. With luck the pad will soak the blockage and draw ink through the head. Give the machine two self cleans and try a print quality test to see if you have made ANY improvement. If no improvement - forget it as the blockage has been there too long.

1. try to cleaning head
2. remove the black cartridge only, (if it doesn,t changed after you cleaned head)
3. provide some warm/hot water on a bowl or plate.
4. enter the HEAD of black cartridge in to hot water. soak with depth about 2mm up to 5mm. while you see the ink is come out....
5. after the black ink has come out. pat dry with a paper towels/tissue.
6. replace the cartridge in to printer.
7. cleaning head again and print test page
good luck....

Hi

The ink reservoir doesnt have to be completely empty to fail. Replace the cartridges. Some of the jets or all of them may be clogged especially if you have not used your printer in a while. If there are cleaning instructions in the manual clean the jets and then try to print from the printer's self test

Goodluck

It is not clear which print head you changed. some time the printer, if it has 2 different print head, for black and color, you may have to try changing the black print head.
But before doing all that , make sure that the ink cartridges are full.
print an alignment page and then try to make a standalone copy.

clean the ink cartridge with lint free cloth. Also check the preview of the text before printing.

You may also try to do a complete uninstall and then reinstall of the printer driver.

try to reinstall the printer driver software. you can download the latest printer driver software from yout printer manufacturer's web site then restart the computer and printer.

your print head may not be engaging the cartridge, please have this checked

you need to change the print head ...

I had the same problem after changing the black ink cartridge. I went to Control Panel of my computer, chose Printers, then Canon Inkjet. Chose Properties, then Maintenance, the Deep Cleaning. NOW my printer is working!!

remove print head assembly. clean off.
print head not on cartridge. 

Have you tried changing the green carrier? That solved my problems with no ink.