Quoted from fossmin:The drop targets do not score any points until you lock a ball. This is for both the top drops and the ones on the right side. Once a ball is locked the drop targets score when they are dropped.
Quoted from Redketchup:target should be down when you start... you lock the ball and they come up...
What Redketchup said.
If your in-line drops are UP when there is NO BALL LOCKED behind them, then you've got some issue that is incorrectly resetting your drops (to the UP position) when they shouldn't be. As soon as you begin either 2-ball or eventual 3-ball multiball, the drops should stay DOWN -- which enables you to re-lock a ball back into the saucer (not desirable... you want to stay in multiball, but this is intentional and correct game state).
Based on your issue (drops being UP with no ball locked), you're hitting drops and physically activating the spring, dropping them down... but you're appropriately not getting any points or any response from the pin from that drop switch because the pin is not expecting those drop switches to get activated in the state of having no ball locked.
Quoted from fossmin:The lights do not light on the playfield either when the targets drop. The switches do register in test mode.
In the previously described incorrect state (drops being UP, with no ball locked), the colored blue or green arrow in front of the drops should be SOLID. This indicates that a ball is ready to be locked, and in the correct state, the drops should all be DOWN with no ball locked.
After you've locked a ball, and knocked down TWO of the three drops guarding the locked ball, the respective blue/green arrow will begin flashing, indicating that the next drop hit will Release the locked ball.
Hope this helps.