On a Latex 370 printer the Light Magenta/Light Cyan doesn't last long. Physically there is nothing wrong with it. It prints fine with no missing nozzles. It just seams to starve or not lay down as much as it should. I always have to change it out and it prints correctly after that. But it prints correctly after only about 10 ft of material then is starts to fade away. If I do a color calibration it prints fine with no banding but it still no longer prints correctly. I have to replace it again. Usually greys should be grey but it comes out yellowish.
All settings are the same. Intermediate cartridges are full. Print head clean was done. Color calibration done. I wasted about 10 LM/LC print heads. One for every job.
My recommendation would be to check and clean the PHs, then print a plot of 36x12 inches in Magenta. If you are still having issues, please contact HP support.
What is the status of each of the light inks (are they possibly expired)? You can get this information from the front panel of the printer, under the inks menu.
I would actually look at a couple things. If you have had several of these heads that have failed under very short use, you may want to determine the following:
RememberTo make recommendations or participate please Sign In and post a message.