OK R15 to Pin 3 of U2 is off the scale with power off. DC volts on pins 1,2 and 3 of U2 are all 4.47 V. Yeah I was kind of wondering about that whole assembly (resistor bank and dip switch). I found a couple of questionable solder joints there and resoldered all of that. I checked across the resistor plus switch (on the solder side of the board) I got the appropriate readings, but when I try to read from R15 to pin 3 of U2 I get an off scale reading.