Re: LG 42PQ6000 plasma

I know this post is super old, but I have this same issue, and I did the same steps here. Is it absolutely the mainboard? There's no other problem that could cause this? I will admit that I didn't measure the voltages, but the TV won't turn on, it is in standby, then power on clicks the relays, then they click off and it goes back to standby. It did run the tests perfectly, does this mean it's the same issue?