"Another +1 for a physical defect causing this problem. The middle socket on the cable that hooks into the APM had been nicked and when I plugged in the cable I bent the middle pin out of the way but didn't notice. I got pretty much the exact same…"
"I've got one of these cracked open right now. It does seem to use Silab chips and there seem to be four sets of programming pads. I'm pretty new to this so someone else can probably shed a little more light on it."