Hi all,
OK, one last issue with the CAB and I'm done.
When I'm playing Robotron the screen periodically goes black for 1-2 seconds and then 
returns to normal. The game continues to play during these 'black-outs' but I'm stump as to 
a reason. I've been testing my control panel for a few days now and Robotron is the only game 
that displays this behaviour. There does not seem to be any pattern to the black-out, but they 
occur approximately every 30-60 seconds.
So far, I've tried running the game outside of my front-end (MameWah) and I've also tried running the
game under MAME 079 and MAME 101; the problem appears in both versions (both via the front-end
and run by command line). Could this be a screen  resolution issue? I don't remember this happening 
before I connected all my controls but, since it's happening only with Robotron, I'm hesitant to blame the controls.
Anyway have an idea?
Thanks again!
Breaker.