LED BLINKING CODES - TH-42PX75U_TH-50PX75U_TH-42PX77U_TH-50PX77U
LED BLINKS ONCE [CLICK ON THE PICTURES TO ZOOM IN]
The A board is defective. To confirm this, unplug the TV and disconnect connectors A5, A6, and A7 from the A board. The TV should turn on automatically and display a white screen.
2-BLINKS
3 - BLINKS
5 - BLINKS