Ok, so we purchased an old neglected XC-540 and replaced all main parts that were bad. Including all 6 heads. They were old, and some had head strike on them. Changed all rank numbers and set up machine. Pulled ink from all heads and all caps were also replaced OEM. Now we set it to test print but we are getting 0 firing. No prints at all. All cables to the heads are also new. No fuses are blown and transistors are good. So i'm sure there is something I am missing. Weather one of the main boards is the issue or something. I'm not getting any service errors. And I can send jobs to it, but heads wont fire. Not one out of the 6. I just dont wanna buy a new head board to end up in the same place. Thanks in advance.