Originally Posted by James Carolan
Since you have a dimly lit screen, no dispaly i am leaning towards A board that and you said you have no remote contol over the Tvto shut it down so it sounds like it's locked up, that would suggest A board too.
I'm not an expert on these models though. Another thingis if the LVDS cable (cluster of red cables ob the A board) youwould get a pure white display, when it's connected you get what you have if except if it was working you'd have video date eg picture or on screen display which I assume you don't either. More common fault with these though is the 2/10 blink PSu issue. I 've got the 46PZ800.
It's definitely A or D boards. I still think Modus might be the go, if they won't touch your old board then this replacement may be worth keeping for a core to get repaired, may even be worth negotiating a price reduction instaed from the seller and use that core for a repair.
Problem I see is if i was the seller I want evidience of it being bad or have it returned but some people are good. Most used arts are not tested , The fact the board is for sale means it's out of a broken TV, no ody strips down a fully functional TV, usually smashed screens . They may have manged to fire this board up and get no SOS blinks and assumed it was good. i would, but it's an example of no blinks but still faulty.
I have done a bit of component repair on the Sustain boards SC and have managed to repair one once which fired up, no blinks and primed screen so it can happen, rare though for that to be SC board.