After 30 5-ball games all four of the drop targets stopped working. In test mode the lights come on and there is a clicking sound from each target, but they do not pop up. I've read about issues with one or two targets not staying up, but none of mine move at all. I submitted a ticket to CGC. Rest of the game works fine.
Added 22 months ago:New user error, did not know the high voltage switch needs to be pulled out one click to test the solenoids. One drop target would not stay up in game play or test and I fixed it by doing what some others have done: I replaced the factory spring with a Bally-Williams flipper return spring that has a little less tension. Now drop target works fine. Thanks to those that mentioned this could work.