Phew !
The guy I bought it from (Jeff Tao goes by arcadestuff on Ebay) was kind enough to swap out this one with another monitor + video chassis for $60. That was even after he heard how I blew the thing up by accident.
Anyway, looks like I blew out he H sync circuit on the video board (a 29 " Hitachi monitor + control board). Odd thing is that it had a button on the front labeled 15khz/24khz, but it was a myth. The thing was only capable of doing 15khz to begin with whether that button was pressed in or not. Found another guy on the web who did the exact same thing as me on another Jaleco Pony with the same result: dead Pony. This once again confirms this is not a user friendly hobby.
Anyone who is looking for a prebuilt cab really should do business with this guy. I haven't heard one bad story about him, but have heard alot of good ones. I mean even if you just part it out for the 29" monitor and controllers, coin mech and all, $300 is a darn good price. He's also got some of the tough to find Megalo 41" cabs for about $1200.
Now trying to figure out how to add a trackball, 4way and spinners with zero real estate left on the control panel. Hmmm.......