I have noticed on these Zoo keeper/Qix boards (BTW, the second level of Dante's hell) and I've run into now three boards that have had their 12V line shorted to ground. In all cases, it's been due to the tant capacitors. I've got some new ones in stock, yet in one case merely having that cap installed (new cap) will cause the short. That's the general observation. The question part comes down to this: is this pretty common for tant capacitors in general? Do they tend to fail short? Since they're used only to cut down on noise in this application (4116 chips), I can run the board just fine without them. Although if there were designed to run with them installed, I'd like to have them installed. Just curious. I've updated my notes to read "check tant capacitors on 12V short" ... :) --James Bright www.QuarterArcade.com Restored Arcade Games for your Home