[wagonman76]

Im not sure what all the display pins should get, but it may be such an erratic or high frequency signal that you wont get a true measurement anyway on anything except the power pin and backlight pin for the display. The power pin should be 5.0v, anything less than 4.9 caused problems with mine.

To desolder, get a desoldering braid. It works much better than the plunger. Put a clean section of braid on the solder and the iron on top of it, the solder will come off the board and stick to the braid.