I just got this black hole in not too long ago, and it's a bit of a basket case. Too-many-pins hooked me up with a new small transformer (thanks Skip!), and voltages are good at the power supply.
I've done all the ground mods, and it still locks on all controlled solenoid as soon as I turn the power on. All the transistors seem to test out fine on the driver board and under the playfield. I tested all the diodes on the remote boards and coils as well, all test good.
I've already ordered a new all in one board from pascal janin, but I want to know if anyone has anything I can look at that might be an issue outside of the boards? Is it likely an mpu issue?
I've searched the web for answers but no one seems to report having every single controlled solenoid locking up at the start.
I should mention that I'm still testing this with the lower playfield out of the machine, but that shouldn't matter right?
Thanks for any input. I always get the strangest problems.