Question about Samsung TXN3071WHF 30" TV

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Powers on but turns it self off after 15 seconds.

When the power button is pushed the TV will turn on for less then 15 seconds and turn itself back off. no picure ever shows but you can hear the TV trying to power on and it makesa little charm nosie like its trying to turn on. the red power lith will just come on and flash.

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  • bubbadubya Dec 21, 2007

    Exactly as previous problem was described, the set turns on but turns off right away. Tried hitting and thumping set, and problem went away for awhile but now not even that works. Could it be a problem with the power supply?

  • CJB3884 Apr 07, 2008

    same deal, only sometimes I can watch mine for a few hours, other times it wont come on at all (but the red indicator light is on, and I hear it power up)

  • Anonymous Apr 27, 2008

    The problem started with the tuner having problems after warming up for an hour. Channels between 38 and 47 would stop working. Not always the same, sometimes 40 to 47. Now, the channel problem still exists, but shortly after the channel problem starts, the set turns itself off. Let it cool off and it will start again with the power button.

  • asidarous Jul 17, 2008

    When the power button is pushed the TV will turn on for less then 15 seconds and turn itself back off. no picure ever shows but you can hear the TV trying to power on and it makesa little charm nosie like its trying to turn on. the red power lith will just come on and flash.

  • jlaw87 Sep 02, 2008

    Same issue. TV is about five years old and only recently have we had this 'shut off' thing start. It started to happen more often... now it only attempts to turn on before shutting right off. I guess I'm going to fork over some money to get somebody out to look at it....


  • innes12 Dec 03, 2008

    My problem is exactly the same. Tv powrs on but turn itself off after a few seconds. Screen stays black The first few times it did this I heard a few seconds of sound, now that seems to be gone as wll

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CHECK FLYBACK TRANSFORMER LEADS FOR BAD SOLDER JOINTS, HAVE REPAIRED SEVERAL WITH SAME PROBLEM.

Posted on Mar 17, 2009

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The symptom you describe suggests power supply failure. It is still working but fading fast

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You can start out by resoldering all poor solder connections and look for bad capacitors they will be puffed up on Top.

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TV turns on, then turns itself off about 2 seconds later.


set has a self diagnostic---after set does shut down press and hold MENU AND DEVICE(INPUT) buttons on front of set for 5 seconds----if 2 blinks, a pause and 2 more blinks: this is short protection error code---The set does use 2 Stk394-250 and each is protected by a pico fuse in the power supply---if either fuse is blown the set will shut down(it detects no voltage or missing voltage;) It is not uncommon for a shorted IC to cause this problem; if you locate the STK's look carefully at the resistors around them---if any are discolored or burnt---you have found your problem.

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1 Answer

TV Powers off


tap on the power supply borad not to hard
and have some one let you know if pix fark out
go all thur all the board soune like you have bad solder jonts

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