Quoted from cybercid:
Hello year it does not work in self test and in play. The lower relay is working. The main coil is not activating. Could it be the wirering?[quoted image]
1. Check fuse F10 (2.5A slow blow)
2. Check the 2N5879 transistor (Q3). They are known to go bad. Use diode test function and compare to another under-playfield 5879 transistor.
3. Check the coil. The 2 coil circuit resistances should be 2.8 & 40 ohms (it's a flipper coil).
4. Check the switch next to the coil mechanism to make sure it works and it making/breaking contact to the coil.