I do not have the service manual for your specific model, but it can be repaired. The most common problem with Plasma
TVs, from the symptoms you have, is one of the Y-boards has failed. There are three Y-boards, two Y-driver boards (an upper and lower) and the Y-sustain board, which provides signal and control to the Y-driver boards.
The Y-boards are what provides the horizontal signal and high voltage to the Plasma display. Normally one of the Y-drivers fails and will shut down the entire high voltage circuit. The board is replaced. A replacement board runs about $125, plus labor for repair. It is possible the Y-sustain has failed, they are a little more to replace (about $250), plus labor.
The TV will need to be diagnosed to determine which has failed, and the power supply for the Vs and Va voltages should be checked.
A service estimate will run about $100-$125, depending on your location. The estimate charge will apply towards labor for repairs, should you decide to have it repaired.