Question about Samsung Televison & Video

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Moved our Samsung lcd tv into a different room last night and since then our screen remains blue when tv is powered on. The only way that we can get a picture to appear is to remove the coaxial cable and then reconnect, then the picture appears and it works fine. Everytime the tv is powered off the same problem happens again when we turn the tv back on.

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  • boomer36 Jan 13, 2011

    We had already tried the auto tune several times. This does bring up the picture but again it is only until the tv is powered off and then it's the same blank screen when it's turned back on.


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Just retune the TV with coaxial cable connected, make it auto tune as per its manual says. Make sure to note whether the coaxial cable end connections are firm. The problem now you faces is due to AGC [automatic gain control]. It must be retifed as you autotune the tv. Please wait till all the channels have been tuned and stored in its memory and displays the first channel received. Make a keen look at the coadial cable connections and make sure that it has no break inside at all. OK.

Posted on Jan 12, 2011

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  • The Knight
    The Knight Jan 13, 2011

    The tuned channels are not memorizing in it. It is the problem. It can neither due to the trouble of its tuner inside, if it is connected diretly with an antenna, nor the trouble of the tuner inside the settop box. When we put the system into autosearch mode, it must tune all available programmes and should send each programe paramenters in the form of different voltages, and will be stored into a memory IC iside the system, whatever device we use to tune be. Whether we use the TVs tuner , it may be due to the Ts tuning section, and its mamory section. if we use set top box to tune channels, this fault lies inside that device's circuits.
    Just determine which device has the trouble. Just tune the TV with connecting an external antenna first. If it memorizes the channel positions it is ok. If not the TV should be chcked out by replacing its memory IC, whicl will be a small one with 8 pins , can be located very near to the system control IC, and can be replace easly.
    If ite fault is with set top box. you have to look into it in the same way as I described above, and do the same thing as i suggested in case of TV.
    If you have further doubts, feel free to contact me through Fixya. OK.

  • The Knight
    The Knight Jan 13, 2011

    The blue screen you see is due to no signal position, as the blue back option is set to on. When there is signals, it will chage over to that signal and will display it, and when there is no signal the screen will show a blue background as you see now. This may also be due to the trouble of set top bod, if you connected, from which it outputs no signal at all. Ok

  • The Knight
    The Knight Jan 13, 2011

    Just check the cable that connects the TV and the other device, ie, set top box, external anetenna; for any break. Check the TV is set to recive transmisson, by going to its settings, and try to tune it with external antenna first, and see whether it responds to any transmission on air or not. If it doesn't respond to these, surely there will be some truble to its tuner. The blue screen is the clear evidence, that its Video If section doesn't get any signals and it must come from its tuner output inide it. OK.


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