04-09-2012 01:09 PM
Officejet ProL7780 All-in-one diagnostics page will not print the colors cyan and magenta. What does this mean? I am trying to figure out if I need a new print head or a whole new printer.
04-09-2012 02:15 PM
The diagnostics here may help. Magenta and cyan share a common printhead. If there are no traces at all of cyan and magenta I would suggest removing the printhead and soaking it for five minutes nozzles down in about 1/2" of very hot water. After five minutes remove the printhead and gently blot dry the nozzles and the electrical contacts, then reinstall in the printer and run a cleaning cycle.
Bob Headrick, HP Expert
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07-04-2012 03:43 PM
Partial solution. I had NO black before. No I have black with missing lines and info all over the place. So I performed head alignment, head cleaning, line feed calibration... and it's worse. Brand new ink cartridges. Nope. Same problem.
Thanks for the attempt to help me.
After, literally, 20 years of devotion to HP, I believe it is now time to question my brand loyalty.