Not a TV repair forum. Use google on that model and either repair or "no picture" and you find the usual TV repair forums. From what I read service folk replace boards.
Model HP-S5053 50" plasma. The screen suddenly displayed flash of colors. Then after shutting down and restarting, screen is now blank, no picture. Sound works fine from DVD to HDMI. But occasionally when turning on and then turning off, the screen will flash a myriad of colors while shutting down. There are also 2 leds lit up on a board behind the component interface (AA1) with one blinking labeled led 2000. Any clues?