The nozzle check printout shows everything perfect, except for dark cyan, which is top half dark and bottom half light cyan. When I do a print head alignment, it shows that the printer is capable of printing a solid blue block, so I assume no nozzles are blocked. What is the problem here?
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It means some nozzle not perfect. If you check nozzle, there is missing lines for some nozzle. Example : Print blue color ( 100% cyan + 100% magenta). If some point of cyan head is clog, the output will be shown that at some lines just show magenta. It repeated.
Yous said every 8 mm, so, you must print it at best photo quality.
If you have print at best photo quality, and lines still appear, it must some nozlle badly clog. Try do head cleaning, wait for 30 minutes. Check Nozzle.
I read earlier that black and magenta were printing but not cyan or yellow.....HP says to gently wipe the side of the electronic band but not the bottom, I did all of the above...and the printheads carefully, no change w/ the printout from "clean printheads"...the cyan had an occasional blue line(very fine) and there was no yellow.
So I trickled warm water over the cyan and yellow printheads....then thought what the heck, got a bowl of warm water and swished the printheads half submerged. They print perfect now I have the reds, yellows, greens and all the colors back w/ the clean printhead option and printed a coupon, it was perfect.
I hope it's not a short term fix...I developed the problem when I didn't print for a long time, hope this helps someone, Cyn
BTW, I flashed a light down in the recepticle for the cyan and yellow printheads and they were gunky w/ blue and yellow gook, so I clean that out w/ a damp lint free rag....paper towels shredded and I had to carefully remove the remnants.
Can you confirm that you are using a CIS or non-HP cartridges with this printer?
It sounds a lot like the printhead has reached a clogging point where sediment has built up in the black portion and loosens enough to printer a few lines before it re-asserts itself again.
Based on my experience of this printer, if you're using a non-HP delivery system for ink then you should consider replacing the black ink with a dyebase alternative instead of pigment.. Replacing the Black/Yellow printhead and running a number of test prints to purge the pigment ink in the printhead should then result in a clean and more reliable printout in future.
One other vector for problems is the cleaning area and I've found that this can become soiled with excess ink causing cross contamination within the inks of one printhead. As yet I've not found a reliable solution to counter this sort of issue.
Hope this gives some clues and hopefully some ideas of a fix.
Try doing a nozzle check to see which colors are getting through the printhead. If you are missing lines in the pattern or there is no ink color showing, you will have to do a head cleaning. Was your printer out of ink for any length of time? If so, it is a clogged printhead. some printers are designed in a way that will not allow you to print at all, if you are out of a color. They do this for a specific reason- If you were allowed to print in black and you were out of yellow and you did this for a month and then replaced the yellow, you would have a clogged printhead. Why? Because there is a reservoir in the print head and if you do not replace the ink, after a while, the ink in the reservoir will dry out and you will have a clogged printhead. The only way to fix this is to do a head cleaning (2-3-4, depending on how bad the clog is) and that uses a lot of ink. So, Epson does not allow you to print if one color is out, to save you the time and expense of having to do a head cleaning.
Did you remember to take the tape off the top of the cartridge? If so, run a few cleanings and do a nozzle check. If there is still no cyan, your print heads may be clogged
It's NOT a cartridge if this works... I had a similar problem with a 9600 I bought on eBay that had been inoperable over 18 months. Three colors would NOT clear up after multiple power cleanings. Epson support politely solved the issue at no charge on the phone... he had me drop a few drops of warm water on the pad the printhead rests on when not printing. You have to move the printhead to the left to do that by moving up the little lever near the cutter. The pad is easier to reach with a long eye dropper. I used very warm water- not boiling. I replaced the printhead over the warm water pad for an hour. Then I repeated the process and let it be for another 60 minutes. Then I did a nozzle check and what was gummed up yellow, cyan, and magenta nozzles became clear and it's worked fine since. Good luck!