I actually had to lower my resistor value down to 1.5K (I didn't have a spare 1K) which gave me a max value of 120mV. It sounds ok to me, but I guess I'll replace it with a 1K so I can get up to 130mV.
That also happened to me. I'm not sure I short circuited, but that seems the most logical explanation. Now, all 6 LEDS are on all the time, and it seems that the CPU reads the Shift button to be on all the time, since I don't have to press it to Init the EEP or set an instrument midi channel using i...