Problem with Samsung LN46C630: input switching at random
by jonstolk - 7/2/12 5:59 AM
In Reply to: reply to solution by gsdeoraj
I had a similar problem with a different Samsumg LCD set. A few weeks after its warranty expired (of course), my Samsung LN46C630 LCD HDTV started randomly switching from one input to another, as if it were looking for a signal. I read a lot of blog posts from folks with a similar problem, and started down a long path of ordering and installing new boards for the TV. I tried replacing the MAIN BOARD BN94-02701J, the LJ94-03334J Controller, and the power board. None of this fixed the problem.
When replacing these large circuit boards fixed the problem, I was ready to toss the set into the trash. But in a last ditch effort, I replaced one more board: the Bn96-13451C
Assembly Board (my board was numbered BN41-01382A). AND IT SOLVED MY PROBLEM!! And here's the kicker: at about $32, it's the cheapest of all of the boards that I replaced. And I found it on amazon.com.
This p-touch board is a tiny board that takes the signal from the remote control, and from the touch control buttons on the front of the set. It's a little difficult to get at, as it is tucked behind the front bezel, and you have to disassemble much of the case to access the board. Oh, and to make things more difficult, it's connected to the front bezel with adhesive, so it's a real pain to remove without damaging the circuit components. But with some careful prying, you can do it.
Hope this helps!
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