N/F Ground?

I’m working on a custom laptop, using an old LCD screen. I’m having trouble identifying a pin on the board. There is an 5x2 section of header pins that connect the LCD controller to the inverter/power supply, 2 are +12v, 2 are +5v, 5 are GND, and one says N/F GND. I’m not sure what it is, I’ve been doing a lot of testing with my multimeter, but it doesn’t seem to be connected to anything on the controller side board. I searched Google for a while, but “N/F” doesn’t seem to be search engine friendly (I get a bunch of strange search results). Any ideas of what it could be?

Here’s the pinout:
(12v) (GND) (5v) (BL GND) (N/F GND)
(12v) (GND) (5v) (BL GND) (GND)

The BL GND and GND pins are connected together (continuity test).

This is more or less the Power Supply/Inverter (Mine has “-AB” added to the end of the model number).

On a side note, which would be easiest:
:% Connecting an ATX motherboard to the power supply above (I’d need add a 3.3v regulator somewhere, and figure out what what to do with the Power Good, 3.3v Sense, and 5v Standby ATX pins).
:% Connect the LCD controller board to an ATX PC power supply (I’d have to figure out what the N/F GND pin does and create a DC-AC inverter for the backlight (at least I think so, the power coming from the inverter to the backlight is AC…so that seems logical to me).

ATX Power Pinout:

‘\0’

but "N/F" doesn't seem to be search engine friendly (

N/F stands for no fit, it is used to describe the absence of an electrical part.

So it shouldn't be connected? I'll try using jumpers leaving that pin unconnected and see what happens.

EDIT: So the N/F pin has to be connected or else the backlight will not come on. I wonder if it is a signal pin for the backlight? I'll try hooking it to a 5v line a little bit later when I get back, grounding it does nothing.

Thanks! '\0'