Mutoh Print Head Stopped Working.. Please any ideas


I have an older mutoh falcon 6 color.

I replaced a yellow cartridge and it wasn't printing so I did a cleaning...

Then the nozzle check was all yellow so I cleaned the head with a little solvent and then did a power clean.

It worked fine for about 10 ft then it was like some one shut the head off. All three colors on that side just died.

I pulled ink through the dampers.

I saw ink moving though the waste lines when I did a cleaning..

I'm stumped.. Is it a bad head or something else?