I have an issue where the lights and scores dim momentarily when the flippers are pressed or the ball hits the pop bumpers, in other words the when the solenoids activate.
This is a Gottlieb Sinbad and I am new to the workings of Gottlieb machines as up til now I have only had a Bally Strikes and Spares..

Any ideas or suggestions where I might start is much appreciated..

Cheers: Brettski... :)