I found an extremely helpful video on YouTube after my LG washer decided it was going to die mid-cycle and not power back up, video here - http://www.youtube.c...h?v=MB9-dBYZip0. After going through the tests in the video, I replaced my noise filter and the main PCB, as the filter was not outputting any power and the main PCB indicator LED was not illuminated.
After replacing the noise filter, I was able to verify power leaving it and heading to the original main PCB, in which the LED still wasn't lighting up. At that point, I replaced the main PCB, and the new one doesn't seem to be working either. The only difference I seem to notice is a clicking sound. After I connect the new main PCB, and I provide the machine with power, the PCB clicks twice and then does nothing. If I press the Power button on the washer, it makes the same clicks. There are 2x clicks, about a second apart, and then nothing.
I've tested the power coming into the unit from the wall and it's steady/correct. I tested the noise filter again, just to make sure nothing blew out again for any reason, and its still working fine. I'm now at a loss for what might be happening. I'm still happy to attempt to troubleshoot it myself, without paying a ton for a service call, but I'm not sure what else to be looking for at this point.