LG 50 inch plasma has trouble powering up. have

A blown capacitor might not be the reason. After 15 to 20 minutes of work, the temperature inside the set do rises much, this kind of fault can occur. Check its cooling fans.

The power supply board have problems,it not giving the tv the right votage anymore.That why it shutting down,not sustancening power to the tv anymore.That the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power board for the replacement.

bad power capacitors - fried/bulged/burnt
possible original size under-rated or pulling plug from power source without turning off tv

Power board is dead,Know how to solders?Check replaced Capacitors like burst open,or puff up.Or buy
the whole refurbish power board.Tries websites Shopjimmy.com,Ebay.com.

I suggest you guys take your TV's into a repair shop like Sears or Best Buy... The main reason most plasmas go dark is because of decay, but I don't think this is the case. Because what you describe is similar to what happens in LCD's when their back light goes out. Although you can open up and repair the back light your self in a LCD, I would not advise you to do so for a Plasma, because of the hazardous chemicals used in the plasma display plus the fact that plasmas don't use back lighting. And 2 years is way to soon for decay to be a factor. So more than likely a circuit shorted out and the TV has to be opened up to be repaired.

This is almost certainly the device that sends electricity to the the plasma in the panel after failing. Bring to your local repair shop and expect to pay 300-400 parts and 100-200 labour.

Cheers,
Stephen

Hav 50 inch lg no pic but got sound wtf how do i fix it an there r 5 flashes b4 green light stayes on at the start

Unplug the unit and let it sit for a minute. When you plug the unit in and try to power it is there any change in the light? Does it go green and back to red or just stay red?

probably you switch was sticking causing it to behave that way.just monitor you tv if it happen once more then it will be time to call the tech.standby my brother.