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Panasonic Plasma TH-42PX60U - power light blinks 12 times

Have a 20 mon. old TV just turned off by iteself while it was on, i tried to turn back on and it seem to turn on and then shuts down by iteself and the i see power light blinks 12 times. Panasonic is not taking any responsibility and neither is their tech/service center, so i can use help to find out the problem and if anyone have solution.

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  • Anonymous Nov 18, 2008

    i als have the same prob. less than a year old 50 in. pansonic plasma. power light blinks 12 times.

  • Anonymous Dec 02, 2008

    I have same issue with 42' LCD

  • Anonymous Dec 15, 2008

    I have the same problem, i was only less than a month out of warranty, mine shuts off and blinks 10 times, they will not take responsibility!

  • vortechsoto Jan 17, 2009

    l have the same model TV, and the exact same problem, my TV blincks for 11xs.... any solutions, ???

  • Anonymous Mar 18, 2014

    the television turns itself off after only about 20 seconds after turning the power on


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Bad capacitors...! Remove rear panel cover from tv. Most require a star screwdriver. Look for bulging caps in power supply board. (3300uf 10v ) caps need to be replaced with 3300uf 16v. Identify the bad caps.... Caps are bad when they are bulged/bulged and raised. A good Cap is flat X top not raised or buldged. I have pics of what bad caps look like on these boards. Email me if you would like to to see them. Caps cost abywhere from 1-2 dollars or you can buy them in lots of 10 or 12 on ebay for around 8 bucks. Caps need to be soldered on. Do it yourself (if confortable) or take it to a tech/pc repair shop in your local area. Do do that unplug all the wire harness from the board and unscrew the boarda nd take to your teck to solder on the new caps.

You can fix this for about 20 bucks if you have someone else solder or 40 cents if you buy the caps on ebay and replace the 2 bad ones yourself. If one is bad and the other is not replace them both.

The caps go bad because they need to be a higher voltage. 10 insn't enough..... 16 is plenty and don't go any higher than that.

Good Luck


Posted on Feb 07, 2009

  • GySgt2u May 08, 2009

    Could be the SC or SU board. However while working on one of these I had no V on the 5V distribution from the P. Tracing Pv5 to the D alrarm panel and then on to the SS. I replaced the P nothing replaced the D nothing then replaced the SS and the set fired up.

    Could be any one of the boards. I also replaced caps on the PS.

    I have a comparable service manual if anyone is interested...


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Last night we worked on a TH-50PZ700U with this exact set of symptoms. We swapped out the H and DG boards with a known good unit (mine!), to no avail. Still no power and 12 blinks. Then we swapped the D board and it worked immediately and perfectly.

I cannot tell you if this is the right revision, but here is the board we swapped.

Posted on May 08, 2009

  • bastaniradme Sep 07, 2011

    I have two Tv and try to move all board but still 12 times blinking

  • Holly Hill Oct 28, 2013

    Can you explain this to me in a first timer terms as you havent explained what the actual boards you are talking about are?


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