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I have a Samsung LN32A550P3FXZA LCD flat screen TV. It worked fine one day last week, the enxt day it quit. The backlight is not on. When the TV is powered up, the backlight comes on for about a second, then turns off. I am assuming, from the info that I have read, that it is probably a power supply board, but I hate to order parts that I cannot return, if that is not the problem. Thank you!

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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hughv
  • 196 Answers

SOURCE: can't turn on PC, Presario SR2163WM

You sound like you know what you're doing, so I expect you've made all the motherboard connections(Same as the original PS). Does the switch work when you test it? If so, it sounds like the PS is DOA. I've had bad luck with cheap power supplies.

Posted on Sep 18, 2007

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SOURCE: HP Pavilion a705w power supply

mtn texas , If you PSU cooling fan is not working it could be just the fan. However based on the other facts you have a failing power supply.. Its not dead completely yet but it will be. If you want to contact me direct my email is theflyer_98@hotmail.com... I am a certified Tech and run my own computer repiar business.

Posted on Dec 12, 2007

fwadley
  • 482 Answers

SOURCE: Power supply stopped working

most of the time you need to replace the mother board as well as the power box, it shorts the mother board out.

Posted on Mar 15, 2008

  • 1 Answer

SOURCE: dell power edge 4600 wiht 4 power supply redundant problem

thanks for your no answer !!!

Solucion: apagar servidor, cambiar la posicion de la fuente de alimentacion que marca el error ( el visor LCD indica la posicion de la fuente de alimentacion con error ) y ver si continua el problema.
Sino continua, ok
Si continua y sigue marcando la misma posicion, dos opciones, o es la tarjeta de administracion de energia ( esperemos que no ) o es un fallo del LOG de Hardware, con lo cual, bajar la herramienta DSET de Dell y borrar el LOG ( tercera opcion ) y voila, el equipo como nuevo.

No me molesto en traducirlo porque nadie se ha molestado en ayudarme, lo pongo por si le sirve a alguien.

Un saludo y menos expertos y mas trabajo !

Atte

Posted on Nov 04, 2008

  • 718 Answers

SOURCE: how hard it is to replace by yourself main board Samsung LN-T4065

You need to do some more diagnosing of the problem. If you get sound and change channels take a bright flashlight and place it again the screen. Look for an image around the edge of the flashlight.
If you see an image that means the LCD controller board (TCON) is probably good.

The problem is probably one of three causes;
1) Inverter board is bad
2) CCFT (cold cathode fluorescent light) are bad.
3) Power to the inverter board is bad. You can also check the connectors.

Posted on Mar 30, 2009

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