Question about Samsung LNT4069F TV

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When tv is turned on tv does not come on instantly anymore; makes clicking sounds; red light in lower right hand corner goes off and on in random sequence; blue light along bottom of screen make take 3 to 4 minutes to light up; still clicking noise; then finally picture; cable company has come out twice to check all signals and made sure all cables were plugged in correctly; need help!

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  • davidmidd May 09, 2010

    as this fallas under warranty do i have to contact a samsung authorized tech or any tv tech is ok?

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  • Samsung Master
  • 19,396 Answers

Hi.

The most common cause for the problem is a faulty PSU. In some case a defective main board can cause the same problem.

I explained how to test PSU and main board control line in this article:How to test an LCD TV or monitor PSU.

The inverter can also cause the fault, but in that case you usually get sound and no picture, at least occasionally.

As explained PSU is the most common fault causing this problem, but main board must also be tested. Mnor parts as PCB sub, cables, switches and connectors must also be tested for common faults like bad contacts, cold solder joints and shorts.

Here the parts:

Samsung BN96-06669A Main Logic Board
SAMSUNG BN44-00167 Power Supply Board - Main -LN-T4069F




Posted on May 09, 2010

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What can I buy / replace to fix my tv? I have a 4 year old Samsung LCD (LNT4069FX/XAA.) A few months ago the image started ghosting, or flickering and repeating itself multiple times down the screen, accompanied by a slight discoloration and / or darkening. At first I could "fix" the problem by gently applying pressure around the frame, or by swiveling the TV on it's stand back and forth. Once the problem was "fixed" the picture was perfect, and would remain that way until the TV was turned off, where I would have to start all over again the next time it was turned on (usually at least a few hours if not over night in between.) Eventually the turning / applying pressure did nothing. The TV would however "fix" itself after approximately 10 minutes. Again, resulting in a perfect picture and lasting until the TV was turned off. Over the course of 2 or 3 weeks, it would take more time upon start up for the problem to fix itself, 15 minutes, 20 minutes, until eventually no amount of time would solve the problem. It is worth mentioning that this occurs on any inputs, and even with no inputs - it is definitely the TV, not a cable or a source problem. I happened upon a similar complaint on your site, where the advice given was to replace the LCD converter, which I did, and the problem is still apparent. Do you have any other solutions that I may try? I would much rather fix this TV instead of buying a new one. Thank you for your time! - Jim D (the article I mentioned is here...) http://www.fixya.com/support/t8380218-samsung_hdtv_ln_t5271f_approx_4_yrs

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