Do you have a repair service in Oklahoma City? After about a year our plasma won't come on at all. We have called the 800 number a few times with no luck.
do you know the manufacturer of the actual screen used in your badged product. My "no1" son has had a great success with repairs to LG screens at 42 Inch sizes. There are problems with the build, but can be sorted with persverence. Your total failure sounds like a power supply fault which "no1" has fixed also. The swap out module obtained was not quite pin-to-pin comptible so take care to verify the outputs.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix televisions.