Were you able to get an answer from Hitachi Technical to give me an idea of what part might need to be replaced?
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I put in a new Power board as the TV finally would not power up. With the New Power Board the red light shows up - but I can not get the green light to show up which means its actually working. If I pound on the back of the TV above the fan I can see an LED light flash on for a couple of seconds and the fan turns on and I can power the TV up - but then it shuts down right away and I can see the LED light turn off and the fan shuts down. So, I don't think its just the power board that is not working. Thoughts what else to replace/check?