My hdtv started smoking out of the top just behind the screen, what happened to it?

Your tv is burning part of it's electronics. Turn it off and unplug it. Either take it to a repair ship or replace it.

It could be the board. Check the capacitors on the board they are small cylindrical shaped parts. Look for any bulged tops on the capacitors which will indicate bad capacitors. Hope this helps.

sounds like something is shorting and the safety on the psu is kicking in.is the backlight behind your screen flickering prior to it cutting out. if so sunds like a cft has gone faulty. can be fixed though

The power supply board failed. Most cause is the electrolitic capacitors. They look like little soda pop cans. These should all have "Flat" tops if you see any with buldging tops? That is the problem . They are cheap and easy to replace. Just remember capacitors and components in general can hold a charge even after being unplugged for months. They can kill you. make sure you use caution. Discharge those caps. The bad caps are usually visable bad. I would replace them. These caps have a negative and a positive. If you put these in wrong? They will either fizz out and smoke or a loud pop and smoke will happen.
Thanks
Give me a good feedback on here please.

It can be repaired, however, the cost is probably going to be in the area of $200.00 or so. Unfortunately these were not reliable sets. I have repaired way to many of them to recommend repairing it.

99% chance the problem is in the inverter board that provides the AC needed for the flourescent lamps behind the LCD monitor.

There's a small chance it is the power board.

My rca 52 inch hdtv picture looks bowed on the top and bottom of screen. And everything looks like it has a red shadow behind it.

You can't upgrade a panel tv, plasma or LCD.You may have had a plasma panel failure,I sell LG tv's and for the panel to go bad is rare but I have had it happen approx.6 times in the past 5 years.I highly recommend contacting LG"s customer service they will stand behind the panel and get you going again.Good luck!

Don't recommend replacing the light tunnel if you never had any experience with DLP optical systems. you need to pay careful attention to the way you remove any screws or you will be forced disassembling the engine multiple time to get the alignment correctly.

put a hair drier on low at the source of the problem, that should fix it.