I'd second a motion for scraping off the big chips to get some part numbers, to make it easier to get pinouts to hook up probes and other ways to get it to give

I'd second a motion for scraping off the big chips to get some part numbers, to make it easier to get pinouts to hook up probes and other ways to get it to give up its electronic secrets. Though I am rather unplussed with the soldering job there, and personally would disavow soldering such a mess. Big blobs of solder, real crappy joints, and even a few spots that look heat damaged. More than a bit of me is surprised it even worked in the first place.