If you have ink in the dampers and the lines above them have no air in them then a simple cleaning cycle should fill the head. Watch the waste tubes as the cleaning cycle runs. Do you see ink flowing through those tubes? If so, then ink is actually flowing through the head and you might have a blown fuse on the main board if the head still won't print a nozzle check. If you worked on the machine with it plugged in this is more likely.
If the ink doesn't flow through those tubes, either the head is clogged, the cap top is not sealing properly, and/or there is another air leak somewhere along the line. Check the bottom of the head and make sure there isn't a ton of ink build up causing the cap to not seal and clean as necessary. Also, if you took the head out at any time, get down in front of the machine and move the head to the middle of the platen. Check the space between the head and the platen and make sure the left side of the head isn't higher up than the right side. This is a common issue when putting the head back in. If it is crooked, take all of the dampers off and wiggle the head until is sets down into the right position.
If you pulled all of the air out of the lines through the damper, the ink line should be completely full of ink and the dampers in the circle area should be about half full maybe a little less. As long as there is some ink in the lines and dampers, a cleaning cycle should pull it down and you should be able to see the dampers crush. Sometimes you can even hear the crinkling sound it makes when they do crush. If that isn't happening, the capping station probably isn't working right for whatever reason. Even if you have a bad damper, at least some of them should crush when doing a cleaning.