The first column is cyan, the second, magenta, the third yellow and black.
The image in post #20-I believe I ran the wrong extended nozzle check pattern. It was probably SHUKKEN PATTERN 1.
The big block of color is cyan. It really looks just like the image you posted.
The first image is the one I ran this morning after soaking the purge pad overnight with Windex. The second image I just ran after applying some Windex to the screen under the cyan cartridge.
I did as you suggested. I do have three columns of colored grids, but the cyan column is missing the top two grids and there is no cyan accross the top where the version number should be. I'm going to try the recommended cleaning process a few more times.
Here is the series of nozzle check printouts while putting Windex on the screens and the purge pad. I ran a couple with out doing the Windex during the process and those are noted on the images.
The following image is of the nozzle checks I ran after treating the pads on the cartridges...
I'm sorry I didn't get the message across. Let me try again. There was no print out from the dye inks. I then followed your advice by placing a drop of Windex on the small mesh on the print head. I saw some improvement and repeated the process because it continued to improve. after the 6th time...
I cycled through the Windex, cleaning, nozzle check a half dozen times. I was optimistic, but the next 2 cycles got progressively worse. I'm on to plan 'B'. I put Windex on the Pad and pulled the plug.
My Pixma 780 is not printing any colors. When I ran the nozzle check it only printed the top line for the 3eBK cartridge. There's not a hint of any other cartridges trying to print.