As I said, I do _NOT_ have the plug-in version of the Marpet! I have the solder-in version so there is _NO_ MMU board. I had this professionally installed after I tried to do it, so his soldering skills are excellent and wire connections are all correct. All the wires were soldered to the resistors next to the MMU chip.
I tried hooking up another Marpet board from another machine, but that didn't help either. :(
