Solenoids fire on their own and flash lamps never light.

Tales from the Crypt: random coils and dead flashers from a wrong K-1 relay

Cause: Some production boards got a 24 V AC relay at K-1 (the L/R select relay) instead of the 24 V DC part. The AC relay coil is only about 2 ohms and burns out.

Checks

• Read the relay label: it should say 24v DC, not 24v AC.
• Or measure the relay coil: about 650 ohms is correct, about 2 ohms is the wrong part.

Fix

• Fit the correct 24 V DC relay.

Systems

• Data East/Sega CPU Version 3b

Games

• Tales from the Crypt

Related tips

• Random coils firing and dead flashers on Tales from the Crypt
• Solid state flipper does not work: fuses and fuse clips
• Solid state flipper very weak: power side has failed
• Tales from the Crypt: weak flipper kick from wrong R36
• Jurassic Park, Last Action Hero, Tales from the Crypt: random resets in play
• Jurassic Park, Last Action Hero, Tales from the Crypt: flipper dead from its EOS switch
• Tales from the Crypt: CPU and display EPROM types and latest versions
• Several bank-switched coils or flashers dead, or firing the wrong device

Source: Repairing DataEast 1987 (Laser War) to Sega 1995 (Batman Forever), Part Two, Clay Harrell (pinrepair.com)