Ouch good luck man. It could be something of a standard, but I am doubtful that it's industry wide. The connector itself looks to be 30 pin, although not all of the slots in the connector are occupied.
The problem with standards for connectors is that they give up things (like cost, space, weight, etc.) for the sake of compatibility. Inside the device you only need enough compatibility to keep the product versatile in the supply line.
What's the brand and model of the AIO? And how many wires do you count going into the connector? DVI-D (DL) for instance uses I think 23 pins, so that could potentially be a clue. I think your best bet is for the signal that the multi-wire cable is carrying to be a standard.