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How hard it is to replace by yourself main board Samsung LN-T4065

How hard it is to replace by yourself main board or lcd control board for samsung
ln-t4065f lcd tv ?
I have problem with my tv , 14 months old ,
it worked fine and by next powering , picture will come for 1 second , and then get lost
black screen , sound works , it changes channels , etc....
please help

Posted by on

  • macjasmin Mar 30, 2009

    Thank you all for great answers , you are at help a lot , and I thank you .



    So my TV , have power , will show picture for second , and then turn dark. Sound works , tuner works , it will change channels ,



    Yes , even in dark screen , you can in a back that some images

    are moving , so I assume that TCON lcd controler board is OK

    Power Board is OK

    Only part to replace then is MAIN BOARD ??

    There is a add for LN-T4065F on EBAY AUCTION .......

    What do you think if I purchase that main board and replace myself?

    Is there any chance that I would solve the problem ??

  • Anonymous Mar 16, 2014

    power and main boards replaced about 2 years ago. TV is fine for about 10-20 min, then picture goes dark, with slight screen glow. Sound remains fine. If the tv sits powered down for a while, it will restart, but same problem occurs.

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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

  • marionbagget Mar 30, 2009

    Why would you replace the main board if you are receiving a picture and sound ? The problem would appear to be in displaying the image which is where the Inverter board and CCFT come in.

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  • Contributor
  • 14 Answers

Not hard at all. Just be sure that you remember where the screws go back into, and make sure that you are ground strapped to prevent any static discharge into the pcb's that you will be moving/replacing. I've worked on many lcd's and plasma's. Take it nice and slow and it will be ok.

Posted on Mar 30, 2009

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