I couldn't find any reference to updating the board in the LG info I have and I don't see any USB connections on the board. If it has an update on it for the new compressor then replacing it with a new board, it won't have the update. I'll check and see if I can find a tech sheet and wire diagram and look for information regarding the update. I'll ask the other techs if they know anything about this.
Hello again!
The New "Universal Compressor" model is: FLS075LANA, it has a red sticker on it that reads: "Software Update Required, see letter inside box"
The model number sticker has the following information on it: "Linear Compressor / R134a / Inverter 0-225V 56.5Hz"
The Control/Main board that was flashed with new software in the unit is model: EBR789406
The tech put a large yellow sticker over the Control Board access cover that reads:
-"This PCB has been S/W Updated to compatible with FLS075 Type of compressor. If you attempt to replace PCB, please update S/W"
-"Failure to update Software will result in improper cooling."
-"If you do not have S/W writing Jig or have difficulties with Software update, please contact: LG Technical Call Center / Call to STAC (Sears)"
Attached are pictures, the picture of the Control Board shows an unplugged harness, I unplugged it while checking resistance values and making sure they were all able to send a signal through the wiring it the back of the fridge.
If needed, the OLD compressor that was removed and had failed model was: FLB075LANA
Thanks!