Black and yellow missing

[elevationINKS]

New printhead and dampers on s30675 and first test print had all yellow and some black, all cyan and magenta, ink refresh and multiple heavy cleans and zero black or yellow. Not sure what to do.

 

[elevationINKS]

New printhead and dampers on s30675 and first test print had all yellow and some black, all cyan and magenta, ink refresh and multiple heavy cleans and zero black or yellow. Not sure what to do.

 

[elevationINKS]

Hoping someone can give next thing to look at. No black or yellow currently. New cap top station, damper assembly and printhead. Color comes through cleaning but not test print. Black and yellow appear on the cleaning spray pad though

 

[elevationINKS]

Hoping someone can give next thing to look at. No black or yellow currently. New cap top station, damper assembly and printhead. Color comes through cleaning but not test print. Black and yellow appear on the cleaning spray pad though

Yellow is back, black only has a couple jets. Printer sat a week while off and yellow came back. Still not really any black

 

[elevationINKS]

Black comes back after line pressure relief and doing a nozzle text print. Second nozzle test print disappears again but comes back exclusively after a line pressure discharge. Swapping magenta and black will eventually spray black out of magenta. New printhead and head rank entered. Can’t figure out why black nozzles won’t keep spraying and need to do the line pressure discharge to get them to work. Black nozzles aren’t clogged. Help appreciated. No one answers anything on here.