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05-22-2021 10:19 AM
The fault started when I printed an "exercise print" as you can see the red just seemed to run out, followed later by the black on print evaluation prints. I guessed the printhead had failed, and bought another - out of warranty. The printhead loads okay, and seems to be installed fine. However, printhead calibration fails, I guess due to absence of red/black ink! I'm at a loss.. any help will be much appreciated.
05-22-2021 06:06 PM
OEM or third party inks? Just wondering if you have clogged lines. Also did you clean the contacts on the carriage assembly that mate with the printhead?
I am a volunteer, offering my knowledge to support fellow users, I do not work for HP nor speak for HP.
05-23-2021 04:16 AM
Thanks for the help. The contacts were in a messy state. I cleaned them very thoroughly with Rubbing alcohol and q-tips/buds. The inks I replaced with new HP both of them. Do both lines get clogged simultaneously or is it a controller board fault? There's not a molecule of ink getting through..
05-23-2021 08:36 AM
for reference only :
you should go to menu image quality diagnostic print.....
you might see the mk ink blank..... if yes,, go to to ink, replace printhead....
after carriage box moved & open the cover, open the carriage box cover .... take out printhead & clean
the printhead & shake it... then press it on paper towel & see any mk ink mark.. if it has,
insert it back & printer might charge inks & sometimes ink might come back...
otherwise have to replace it...mk/r the most frequent troublesome....
( myself use a repair kit & fill printhead with ink, sometimes lucky & it worked again & saved some $$ )
05-23-2021 12:48 PM
Thanks Ruben. yes I might try priming the printhead. You are right this one gives me the most trouble!
I took a working one out just now, and weighed it and it was 57g. The non working MK/R printhead weighs 51g, which confirms there is no ink in it. But the old printhead was giving me a problem, and I replace it with anew one and the problem is worse. I cleaned those contacts again by the way. ..
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