Thanks folks....
Here's what I got so far.....
Hitting break repeatedly doesn't work.
Star Raiders doesn't load.....
However PacMan, silicon warriors, frogger and asteroids does. But with no sound and no keyboard response...other than reset, option, select and start.
I tried other carts I have and no luck at all..eastern front, basic, pilot
I'm hoping this narrows down the possibilities of where the fault is.
Thanks a bunch guys, I appreciate your knowledge here....