Samsung 2253bw black screen

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  • capthookb
    New Member
    • Feb 2017
    • 2
    • Greece
    #81
    Re: Samsung 2253bw black screen

    Please excuse me for writing in such an old thread but I'm having the same problem with my Samsung T220 as it uses the same power supply board.

    I have replaced all the electrolytic capacitors and the problem remains.
    I tried to resolder the joints on the two transformers and then it wouldn't turn on at all. I desoldered them and cleaned up the joints.
    I measured the primary winding. It was 0.4 ohms for both of them. The secondary was 1.0kohm and 1.1kohm. I resoldered them with new solder and now the problem is back. It lights up for 2-3 seconds and then it goes black.
    I connected the lamps to the inverter of an older monitor and they light up fine, so the lamps are not faulty.

    What else can i check? I'm not very familiar with electronics but I have some basic knowledge

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