I have a Gottlieb Incredible Hulk that I have been working on for a bit. Got all the issues ironed out on it but the issue with the drop downs. This unit has the Ni Wumpf main board, power supply and driver board. All fuses are good to go and every feature works. The issue I am having is if all drop down target have been hit the game cannot reset them. They slightly move and stop. Now if 6 out of the 7 are knocked down and you drain a ball they reset no issue. You can have any order of 6 targets knocked down and they will always reset no problems but as soon as it has to reset all 7 it tries slightly and then stops. Both solenoids test good but I went ahead and replaced one that had some burns on it but didn't fix the problem. I have lubed and checked everything I can see mechanically with nothing seeming wrong. I can manually reset the targets no issue as well.. Any help or places to start looking would be appreciated.