Across the speaker terminals I am getting -1.5vdc on both. I didn't understand where you wanted me to put the black probe and measure the resistor and the cap that I jumped. However by putting the black probe on power grd, I was getting no voltage
I need accurate DC voltage readings from all pins of U205 on the driver board.USe the negative speaker terminal for the black probe. Clamp it down. Touching the screw head can be intermittent.