Crappy photos with some characters invisible but I figured out that it should be OZ9902B
Thank you for your efforts in trying to find this IC. Unfortunately, the characters are invisible/highly worn down on the chip itself, so it wouldn't matter which camera I used, I did the best I could with what I have available.
The 9902B is a single channel led driver, according to the LG panel datasheet, it requires 4 channels. The 6 pin cable that connects to the backlight is:
BACKLIGHT CONNECTOR PIN CONFIGURATION(CN2)
1 Channel1 Current Feedback
2 Channel2 Current Feedback
3 LED Power Supply
4 LED Power Supply
5 Channel3 Current Feedback
6 Channel4 Current Feedback
I thought it might be the 0Z9998B, but the pinouts don't match. It is a 16 pin ic with pin 14 as GND and pin 11 as vin (I think, measures 10ohms to 12V rail). On the PCB, there is an inductor, capacitor, and diode for each of the 4 channels. Maybe that is an alternative layout than the single inductor and diode I see in all the applications schematics?