I don't know what the rationale is for the board being covered in a half inch of rubber potting. A smaller coating would have provided a water seal, and this rubber is a heat insulator. Seems counterintuitive to me.
You will have to replace the board if the transformer has an open winding, because all these transformers are application specific. The silicone was burnt around some of the transformer terminals on my board, which scared me, but I didn't find any open windings. The other special part on this board is the cpu, everything else on the board is commodity and it is a real shame that LG decide to use this rubber potting AND screw up the supply of replacement parts.
I think it's a real flaw to integrate switchmode power supplies into control boards.
the paint, drum, motor, finish, everything looks like new. But, the controller board burned.
I know my way around electronics, mind you, I can see exactly what is wrong (burned transformer), but the whole board is covered in some gelatin that makes any repair impossible.
the power input board is also water proofed with the usual epoxy that you can chip away and do your repair. but the controller board gelatin thing makes it impossible!
oh, and that board not only is NOT covered by the ten year warranty (only the drum and motor) but not a single place carry it. even LG cannot provide me that part for any money in the world. discontinued they say. after 4 years.
if anyone want to pick it up and drive the pristine electronics with an Arduino, msg me. machine is in socal though.