I bought a used mutoh 1324. It was nit used for about a year. As soon as I got it, I changed the maintenance station. My ink would not flow to the head except for yellow. It stops before the splitter going to head. The maintenance station seems to be fine for yellow. I tried unclogging my print head and now not even the yellow pulls through. I don’t mind replacing the print head but before I do I want to make sure the issue isn’t something else. Any suggestions.