Got fired from work. 
Well, now that my schedule has been freed up for hopefully not too long, I was able to pull the pivot out of storage to check on those pins.
2, 3, 7 and 9 are apparently ground pins. Pin 8 is about 77 ohms to ground.
Pin 3 loses resistance when the screen is rotated so it must be the line from the mercury switch. (Portrait = ON, Landscape = OFF)
Pins 1, 4, 5, and 6 report no connection to ground.
Not sure what you wanted me to poke at with the DMM while the monitor is powered.
Well, now that my schedule has been freed up for hopefully not too long, I was able to pull the pivot out of storage to check on those pins.
2, 3, 7 and 9 are apparently ground pins. Pin 8 is about 77 ohms to ground.
Pin 3 loses resistance when the screen is rotated so it must be the line from the mercury switch. (Portrait = ON, Landscape = OFF)
Pins 1, 4, 5, and 6 report no connection to ground.
Not sure what you wanted me to poke at with the DMM while the monitor is powered.
I have some but they are being used for my KVM.