Two flashers out together may be a series pair
Some games wire two flash lamps in series on one driver. If one bulb fails, the other goes dark too, so when a pair of adjacent flashers is out, check each bulb. Series bulbs last longer because each gets less power.
Systems
Related tips
- Wrong coils fire together (A/C bank game)
- Solenoid 12 flashers dead: one of the two series bulbs is open
- Isolating the 50 V flasher circuits for LED flashers
- Whole A or C bank of coils dead
- C-bank coil or flasher not working
- Flashers dead on Banzai Run and later: interconnect board resistors
Source: Repairing Williams System 11 Pinball 1986 to 1990, Part Two, Clay Harrell (pinrepair.com)