HP DesignJet T830 MFP no printing cyan color

[giaci89]

Hi,

i have a HP DesignJet T830 MFP, the ink cartridge are ok and not expired,

the cyan color does not print,

i try to clean the print head and I noticed that the entry of the cyan color on the head is completely clean, 
and in the first print made after reassembling everything, cyan also worked but only for one print,

now i don't know whether to order a print head or maybe ink tubes, or maybe it's an electrical problem?

thanks for the help

printheadall print quality testfirst print after reassembling

[man1972]

proceed ph  cleaning by the maintenance menu and check the output print if the yellow appear if not repeat the procedure if the result is the same you must replace ph