Twilight Zone
Bally, 1993I have a new DMD ghosting problem , that is getting worse once I took off and put back in the ribbon cables
After the one DMD test ( which used to be fine last week, I get a Ram address error and a light flashes on the boards - there is a video
Make sure the ribbon cable is on properly, no pins bent or missed. Reseat all cables related to the dmd going back to the MPU.
Yep. Reseat all ribbons as Lermods suggested.
Next, swap the DMD controller with another WPC game to see if the problem follows.
Next,
Use your DMM to measure the HV to the display.
http://www.pinwiki.com/wiki/index.php?title=Williams_WPC#Testing_DMD_Controller_Power
That looks like both a voltage problem and a data problem.
--
Chris Hibler - CARGPB #31
http://ChrisHiblerPinball.com/contact/
http://www.PinWiki.com - The new place for pinball repair info
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Newbury
Chesterfield, MO