Question about Samsung TXN2775HF 27" TV

7 Answers

Tv shuts down

Turn on with remote.After 20 min there is a bright flash in center of screen and tv shuts down.IN ABOUT AN HOUR CAN START TV WITH REMOTE.have had no problem for 5 yrs.

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  • keymanreh Jan 10, 2009

    TXN2775HF HAS A CRT!

  • keymanreh Jan 10, 2009

    WHICH CKT BOARD?AM AN EE BUT HAVE NO CKT DIAGRAM.THANKS

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7 Answers

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Problem can be dry / cold solder joints in horizontal deflection area, specially near fly-back transformer.
Please look for cold/ dry solder joints on main board and you will notice them as solder on these joint does not look shiny. Resold them all if you have good soldering skills.


Posted on Jan 10, 2009

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Its the problem of power supply board of the tv it needs reparing or may be replacement.it needs to be checked.

Posted on Jan 10, 2009

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  • Master
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Hi and welcome to FixYa,

Initially, 2 of several possibilities:

  • horizontal collapse (least likely);
  • vertical collapse (most likely).
If a DIY (do-it-yourself) is ebing considered, this of course would require opening the unit, perform voltage measurements, determine faulty component and subsequent part(s) replacement. Further, a fair familiarity of electronic components/circuitry and safety procedures, use of a DVM and a soldering iron would be required. It would be to your added advantage access to a service manual or at the very least a schematic diagram with voltage readings. Should you be uncomfortable performing a DIY, perhaps your best bet would then be to seek the services of a qualified professional.

Pls post back result(s). Good luck and Thank you for using FixYa.

Posted on Jan 10, 2009

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HI There are reports that the power supply has dry o leaky capacitors. If you open the TV you will see the power supply # MLT169A.
I have fixed a few of this power supplies.

Posted on Jan 10, 2009

  • ABHISHEK.C
    ABHISHEK.C Jan 10, 2009

    the G board have also the problem. How many times per second does the POWER led blink? (dont worry about the OPC).

    1x per second (constant, steady blink) = bad inverter/lamps
    2x per second = bad power supply
    3x per second = bad main board

    You can buy the parts online and fix if yourself!!



  • ABHISHEK.C
    ABHISHEK.C Jan 10, 2009

    tV which turns on and flashes the Astar logo before the screen shuts down (Green power light stays on). From what i understand this is generally caused by low grade parts and to much heat. I dont know if you have gotten close to the TV while it is running but it gets extremely hot. The main issus with this is it causes the Capacitors to blow. there are about 20 of them and they generally sell for about $1.25 - $6 each online. If you have any experience soldering i have read about other people performing the fix themselves. I dont so i am currently looking into the cost to have them replaced by a professional. I will try and post what i find out. 


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Did you check the fuse in tv ?

There is chance of loose connections and cold solder joints which are easily diagnosed by giving the set a whack with your hand .






Posted on Jan 10, 2009

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Its the problem of the internal circuit components getting overheated and the tv going shut off.that board has to be checked with a meter and the faulty component should be replaced.

Posted on Jan 10, 2009

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That is a problem with the power supply board or a bad deflection yoke, this if the tv is a CRT.

Posted on Jan 10, 2009

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