Chosen Solution

I have the the 2011 Panasonic TC-P42S30 Viera plasma TV that just shut off by itself. At first the red light was blinking 12 times in sessions. I tried all the advice I read above. Nothing has worked. I even unplugged it for a night. and tried the above, Nothing. :( Any other advice????? 3/2018

@msmouse30 the Panasonic 12 blink code is described as : 12 Blinks Error Code These 3 conditions can cause the TV to shut down and the power LED to blink 12 times

  1. A Board.
  2. Pinched speaker wire.
  3. Speakers The transistor Q4930 monitors the speaker amplifier IC (IC4900). Pin 3 is normally high. If IC4900 or one of the speakers develops a short circuit, pin 3 goes low causing Q4930 to go into conduction and output a high to pin AG22 of the System CPU (IC8000) on the A board. When this happens, the TV shuts down and the power LED blinks 12 times. Here is the simplified flowchart for the 12 blink error code