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LG OLED TV no picture no sound but turns on
LG 55EC930T
ANSWERS:
"@lleei since you already replaced the main board the next logical step is the power board. Post a picture of the complete power board.
Update (09/20/2020)
@lleei sure looks like a beast. I attached the testing procedure for the power board (don’t let the description fool you it'should work for yours as well), see if you can work through that. The voltages you listed are all good. Do not forget to test all the fuse on the board. If that all pans out we should not forget the T-con board. I wonder if it fails to post and hence no sound/video. It’s uncommon to do that but it is an LG so….
OLED SMPS Testing"
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