I’ve heard that burning a candle in a room with a computer will cause the motherboard to die. I also wonder if it is safe to burn a candle on a mantle below a flat-panel LCD Television. The holidays are coming and I would love to burn some candles for ambiance but I would hate to lose my costly electronics in the process.

Answer:
this is a myth. more specificially, it was true of earlier projection large screen tvs (you know the old school ones with the ridgey screens). with those, you couldn’t smoke in the room with them, or have candle smoke near them. now, unless you’ve the candle like right next to the TV or on it, it should be fine.
Answer:
I'm guessing from the large number of candles I have burned over the years in rooms with electronics that this a myth. Obviously you wouldn’t want to keep the candles too close to the electronics, as you don't want the danger of knocking it over on your electronics, or wax running over onto them, but just a candle in the same room isn’t going to hurt.
Answer:
Just keep the candles in a well ventilated area where the smoke will not pass through them and you’ll be fine. In no way will a candle harm it unless your putting the flame directly on it. Which i doubt you would do. Don't worry about candles. I much like candle light to anything else.