Attention all pinball fixers and wizards, NEED HELP HERE.... X's & O's pinball
Problem is when the ball hit the bottom bumper , nothing happen BUT left bumper active! not the bottom bumper?
All solenoids work in test mode
No stuck switches in test mode.
Change MPU board as well. no different.
Check solenoid boards in test bench all good, even swap with a good working one. no different
Change disc caps, diode on coils and switch diode as well. (All bumpers)
Check wiring connection between mpu and coils and headers pins as well reflow solder on header pins on solenoid board
Even put in a homepin mpu, no change there
What next ANY IDEAS...............anyone had this problem? Driving me up the wall All bumpers (3) were working fine
