HP8500A inkjet does not print cyan or yellow; will print black and magenta. Fails to align. Cleaning printheads (printer's autoclean) does not solve the problem. Some dampness of some kind visible where printhead electronice meet the printer when I take the printheads out.

Try this...


http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&docname=c01817398

Materials needed: New empty syringe (big one) Gloves (to protect your hands fromink) Alcohol Paper tissue (to clean the excessink) Empty Plastic bottle (Here you putthe ink from the syringe) Important: Ensure that you have put new Magentaink cartridge to HP K8600. Ensure that the printhead arerecognized by the printer or no light alarms. Instruction: Press the Power button to turn onthe printer. Test print in microsoft excel with4 color black/yellow and cyan/magenta. If magenta only is missing means youhave clogged problem from the host. Wear your globes, prepare thematerials needed. Open the top cover. Press and hold the Resume buttonuntil the carriage moves to the left. CAUTION: Be careful not to proceed until the carriage is on the left sideof the printer. If the carriage does not move to the left automatically, turnthe printer off and back on and then try holding down the Resume button again.The printhead can be damaged if the carriage is not all the way to the left forinstallation. Lift the printhead latch. Lift the handle of a printhead anduse it to pull the printhead magenta/cyan out of its slot. Put printhead in thepaper tissue upward. Your printer are still ON becarefull not to touch the flex copper circuit. Get your syringe, use this to pullthe ink from the nozzle cap ( see link picture) After the done the syringe method,Insert the printhead magenta/cyan into its color-coded slot. Press down firmly on the printheaduntil it snaps into place. Pull the printhead latch all theway forward, and then press down until the latch engages. Close the cover. The printer should align theprintheads automatically in a few minutes, printing an alignment page. Print a test with magenta coloronly, If it does not print, try to change the Printhead. This is the only solution I foundin my HP k8600 printing problem.

Hi

you have a cloged printhead

try more cleaning

If nothing happen you need to replace printhead

Ps vote us to keep us alive

Same thing happened to my printer hp L7590. Printed diagnostic, only black and yellow printed; diagnostic for printhead health Ky=good, MC= good. Only Hp products ever used. Uplugged, & discharged static, cleaned copper parts of printhead. Still no fix. On visual examination of floor of printhead compartment rectangular pad ( approx 1/4" by 1/2") is missing. I can only guess that during the paper jam, somehow the pad got caught up and went awol. Not sure what to do now.

The error states that you are using non-HP cartridges for all colours. If black prints fine then you should replace the colour cartridges with genuine HP colour carts. You should be able to get a refund on the refills since they clearly do not work as intended.

Unclip it again and clean contacts on both printer and cartridge with a lint-free paper and a little alcohol (isopropyl alcohol if you have it). Clip it back and run the head cleaning and alignment routine; that should be enough.

Hi Jan,

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.

Martin

Ah, solved already. Cleaning the black print head a few more times did it for me.

1. Get compressed air
2. Run Printhead under HOT water, do not worry about contacts getting slightly wet.

3. Blow compressed air with straw attachment into screens where the cartridge nozzle sits on printhead. then let it sit and dry.

4. reinstall print test page

5. if this fails open paint/photoshop and print a page of the color that is not printing correctly. rinse and repeat until colors flow freely.

I have several ip4300s and I have yet to give up the ghost on a printer with a clog ujsing this method.

I had this same problem. HP worked with me to solve this problem for over a week. I jumped through a hundred hoops....all to no avail.
The bottom line ended up being....Buy a knew printer because it would cost more to ship and repair the printer than it is worth. A fifty dollar turn-in fee was made for up-grading. I did this because there is no solution when the printer refuses to align itself so it can print
from the black cartridge.....sorry johnfleff