I have a Rottendog DMD controller DMD089 that is causing all dots to illuminate on the display. I swapped in a WPC controller and the display worked fine. All voltages checked out. Any ideas of what might be causing this behaviour? Also can I use the WPC scamatic for this or are there differeces?

Thanks Don

The board came in a game I purchased so not sure of its age however it does look new

The williams controller functions normally its only the Rottendog that exhibits the behaviour I'll take some photos....

First image is with a good wpc controller other photos of the problem board and what it displays all dots on

IMG_2815 (resized).JPG

IMG_2818 (resized).JPG

IMG_2816 (resized).JPG

IMG_2814 (resized).JPG

Ok images didn't post in the right order but I think you'll understand...

Ideas

Also voltages measured as follows:

68 vdc = 66
-105 vdc = -138
-115 vdc = -153
-125 vdc = -155
5 vdc = 5
12 vdc =12

Ok thanks I'll contact him tomorrw.

Not sure why I said the voltages checked out crazy day....

Update: problem solved contacted Rottendog had me replace the two LM337 voltage regulators works perfect now.