Question about Samsung LE26R74BDX 26 in. HD-Ready LCD Television

1 Answer

LE26R74BD power board

The TV has power and when it is connected to a tuner there is sound but there is no picture and the screen is black. I have been advised that the power board may be faulty. Can anyone advise me please?

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No, not power board actually..

You possibly have bad inverter board (this board is responsible for creating back-light) if this fails your TV black screen,

Posted on Dec 06, 2012

  • Steve Dec 06, 2012

    Thank you Bonifacio. The only reason I believed it was a power board is because I was advised by an engineer that this could be the problem. I was originally of the opinion that it was a backlight issue. I will pursue this avenue and see if it recifies the problem. Thanks again...

  • Steve Dec 13, 2012

    Hi again Bonifacio, replaced the inverter board. The TV comes on for about two seconds and then goes black again. So it was faulty but wasn't the only fault. Do you have any other ideas about what the problem could be please?

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Sounds like you need a new main board the light in the front comes on when you push the power button right?

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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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