Question about Sony SDM-P234/B 23" LCD Monitor

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A big white vertical static band appears as soon a i turn on the power

This monitor displays a white vertical static band as soon as i turn on the power also there a few horizontal thin gray lines. This happens no matter if its connected or not to a computer.

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  • einundswan Mar 30, 2008

    I'm able to remove the back lid of the monitor and see the power supply card and controller (where the chipset is) card. In the controller card i can see a capacitor with a yellow matter on both pins so may be its burned (just a guess) can it be the cause of this?

    Also this monitor has a front control panel which is connected internally to the controller card. This panel has several buttons included a power button (there is another one in the back which is attached internally directly in the power supply card) when i press this button the monitor enters into the standby state but the others buttons (menu, up, down, enter) doesn't work.

    Could you point me some parts or zones that could be involved in this behavior to troubleshoot?

    Thanks in advance

  • einundswan Mar 31, 2008

    Thanks waterppk i have two monitors of the same type and i have exchanged both cards with the other one, which is actually working, and still retains its behavior, so the capacitor were not the cause.

    Any clues?

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Some of the transistors or the connection to the panel inside the monitor are damaged. There is no absolute fix for this problem.

You can try pushing on the bezel (NOT ON THE SCREEN) of the monitor at the edge of the screen directly at the lines and you may be able to push the connection back together well enough that the line goes away, but usually in desktop monitors the bezel is too rigid to allow you to put any pressure on the connections at the back of the LCD panel.

Posted on Mar 30, 2008

  • Chris M
    Chris M Mar 30, 2008

    Can you upload a picture? It's really difficult to guess and I don't want give you the wrong information.

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