I am working on a Gottlieb Genesis. My ramp flashers were not working. I noticed that the jumper wires between Q55 & Q56 were cut. I ended up replacing both transistors and installed new zero ohm resistors. This fixed the non working ramp flashers on both sides.

After the ramp flashers began working again I played a quick game and noticed towards the end of the game that the ball release under the apron was firing repeatedly. I turned the machine off and then back on. I started a new game and this time when a ramp shot was triggered the flashers would flash and the ball release would fire with each flash of the ramp flashers.

When in test mode, the ball release fires like it should at L14 but it also fires at Solenoid #4(Left ramp flashers) & at #7(Right ramp flashers).

I have now lost flashers again on both sides. Any help would be greatly appreciated.

IMG_1476 (resized).jpg

Still having issues with this. Lower cabinet ground mod has been done. I have tested with a known good mpu and driver board. See results below:

Good mpu and original driver board:
-Ball release triggers at L14 and at solenoids 4 & 7 during test mode.
-Briefly grounding Q55(left ramp flashers) triggers ball release.
-Briefly grounding Q56(right ramp flashers) triggers ball release.

Good mpu and known good driver board:
-Ball release triggers at L14 but nothing at solenoids 4 & 7.
-Briefly grounding Q55(left ramp flashers) triggers ball release.
Note: This particular driver board had Q56 removed at some point so cant test right side flashers. Game the driver board is from does not use it.

When the machine is powered up with the known good driver board, the reveal motor completes one revolution(I am told this is normal?) and a ball is kicked out into the shooter lane. I also noticed that while the motor is running, the ball release is energized. However its almost as if it doesnt have full power as I can manually push on the plunger and it releases. I can feel that it has power though while the motor is spinning. If I manually push it in a ways, the plunger will energize all the way in and hold. None of this happens with the original genesis driver board.

Thank you! One of the jumpers between the resistors had broken right at the solder tab. I did not see it at first but found it with the meter.

Flashers are now working again!