The machine goes through the motions, takes ages, but no coffee comes [email protected]

If you make a pre-ground shot but don't put any coffee in it, and it does the same thing you have a blockage in the brew head.
If it run normally, your grind is to fine. Turn the grinder knob to a larger number. It takes 3 times to change to the new grind.
If it still dribbles, remove the brew unit (behind the door)
Holding the handle, on the top left side is the brew head, there is an outlet pipe(rubber cup) that exits the front side towards the door. 2 screws hold it to the top. Remove the 2 screws while holding the manifold. Once they are removed, lift the l assembly off (becareful, there is a spring and inside a steel ball (don't loose it or your out of luck). Turn the brew unit upside down while holding the brew head in your other hand and the steel ball should fall out. If it doesn't come out put a towel down and tap the brew unit on the towel. This should force it out.
Now remove the brew screen, by holding the screen with your finger and twisting the thumbscrew (remember thumbscrew, DON'T use the key to install the screen, use your fingers.....
Once the screen is out look at where the screen was. There are 2 holes. 1 big one in the center and a small one to the side.
Now use air to blow back through the opening where the steel ball was to clear the opening. Once its open, clean then reassemble. Brew unit on towel right side up. Drop the steel ball in first. Then the spring.
Then place the manifold on top of that with the pipe towards the door. Insert your screws (I turn them backwards a little with a little downward pressure until they feel like they drop into the threads. They should turn down easily, if not back them up a little more ( we are trying to find the old threads) and tighten. Install screen, and tighten with your fingers. The screen just needs to be flush with the bottom of the brew head.
Run another pre-ground without the coffee and rinse it out. Do this once in a while to prevent this.