Samsung LE40R74BDX 40 in. LCD Television Logo
Posted on Sep 02, 2010
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When I turn on the tv, the left side of the screen is dark. Then after 10 minutes or so, the images become normal.

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  • Expert 132 Answers
  • Posted on Sep 02, 2010
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Joined: Dec 24, 2009
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It sounds like you have a bad slave inverter board. I've fixed a few of them with the same problem and it's always been this board. With the back off of the tv, it will be the board located all the way to the end where the problem is. It will have several wires going from it to the screen. You will probably have to get the part number off of the board to be able to find one, as I couldn't find one by using that model number.

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It sounds like a back-light problem. Check all the CCFL back-lights.
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WS-55807: Images are dark on right side of display, but will go away after 3-4 hours.

you could be on the right track get some freeze spray and go around all the parts to see if you can make it act up, same with heatgun or hair dryer when first turned on heat one area at a time to narrow your problem down
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