Replace the maintenance station.
This has to be the first thing you do.
Also make sure around the print head is clean as dried ink and debris can affect the seal
Spent about 2 hours claing all the areas i could get to and reading online to make sure i got all the spots i needed to.
By the looks it is not sealing properly or the head is touching something in the cap and is wicking.
This causes the inks to mix.
Was informed by a Mutoh tech that the ink on the yellow and magenta were known for mixing back into the other tubes. Normally is is the magenta in the yellow tube so they said this is not uncommon when the ink lines are taken off at the in cartridge end.
Once changed do a few strong cleans, do not do any more refills as it just wastes ink and is not the issue.
We have ran strong, Short, Long cleanings, Little Charge and Ink refill just to make sure. We replaced all the ink cartriages with new ones.
When you have changed the maintenance station this should stop the leak and the mixing of colours.
I would be shocked if the printer still has no blocked nozzles, 6 months is too long to have the machine inactive unless flushed with the cleaning cartridges.
We were not in control of how long it set. When the other company went out of business they just rolled it in the back and left it. Now with that being said after we cleaned the yellow lines out we were about to print nice clean yellow. We printed about 4 blocks 5x5 size just to make sure. I then tried to print all for of the CYMK colors about 5 hours later as i was doing other things and it printed black and magenta perfect. The yellow printed about hald way and faded out and the cyan only printed little lines at first then faded out to nothing.
I have now done a 12 hour head soak and more cleaning but no change. I know i am getting ink when doing a cleaning or little charge b/c i can see it move through the waste tube since it is clear but i cannot tell what colors it is.
I was also told i could run an endurance on the pump and close off all colors of ink except for the cyan to try and make it pull but when i start the pump in endurance it removed the head from the cap and runs the pump open so there is no way for it to create a vacuum on the head to pull ink..
SC