So I found this little LCD monitor at the local thrift store ($10!) and decided to take a chance on it. There was no power supply for it, so I opened it up to trace what was going on in this little DIN plug. If you look close you can see where it goes across and has a diode (the backwards arrow) stenciled on the board. After a little experimentation (and replaced fuses) I had the power side figured out. It was rated at 12V and 10 watts, so it was fairly easy to find a power supply for it.
I found a power cord that had a female plug on it, and then wired that to my power points on the board.
I then used a handy opening in the case and hot glued my new power cable in place.
And then viola! I buttoned it all back up and hooked it to a DVD player to check out how well it worked. This particular unit was a slave monitor with auxiliary input capability. I suspect it was setup to be a system for a car where one sibling could watch a DVD and the other could have a game going on the monitor.
My first experiment with it ended up being my Raspberry PI with XMBC software. Here it's doing a little display with streaming from my iPhone via AirPlay.
It doesn't work bad for this, but it's hard to view the lettering with the resolution.