System 6 CPU/Driver board blanking problems

[CABAL]

Hey all, I'm new here!! My first post:)

I'm working on a Williams Blackout, and I have the problem that
the feature lights + coils doesn't turn on.

I've checked the blanking test point and pin 37 on the interconnector, and they
show +4.6V. Also, the CPU board boots normally. I've changed the 40 pin interconnector
for a new one:)
(I've also rebuilt and socketed the blanking section)

Can anyone tell me where the fault could lie on the driver board? If it gets the high blanking
signal, what could component could fail here?

Thanks for your time!!

Nicholas

[Strangeways]

  Nicholas and  to Aussie Pinball

Have you checked the power supply ? The 28V for the coils is off the power supply and daisy chained around the playfield. There is also a fuse.

Have you checked the marvin guide ?

http://www.pinrepair.com/sys37/index.htm

[Boots]

  Nicholas and  to Aussie Pinball

Have you checked the power supply ? The 28V for the coils is off the power supply and daisy chained around the playfield. There is also a fuse.

Have you checked the marvin guide ?

http://www.pinrepair.com/sys37/index.htm

I Agree, check the coil power and read the Marvin guide.
If you have power it may be the transistors on the board or the driver chips.
The Marvin guide tells you how to test these with a multimeter, but be aware that the chips may test ok on the board even if they are faulty, also make sure if you replace the chips that you install them in a socket instead of directly on the board. If the board hasn't had the light matrix resistors replaced with 5W ones yet then it will pay to do them while you have it out of the machine.
Boots