Coil is good.

Now you mentioned that you could not find the "Knocker test". This is how you do it.

Open the coin door - Press the "Begin Test" button
Cycle through the options until (use the + and - Buttons) you see the TEST MENU option. Press ENTER Button (Same as test)
Use the + Key to find the SOLENOID TEST. Press ENTER

You can select the "RUN" mode and it will check all the solenoids. The door has to be closed for the voltage to be applied to the coils. It will cycle through all the coils. You are interested in Solenoid 7.