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Thread: back light in the screen lilliput EBY701

  1. #1
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    back light in the screen lilliput EBY701

    the problem is , when i Power on the monitor, the led shows blue but the screen shows black, i dont have a a back light but i see osd, how resolve this problem???
    tanks

    please help me

  2. #2
    Newbie _psych_'s Avatar
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    so, your monitor is technically on, correct? if so, do you have your vga cable properly hooked up? is your pc on and running?
    Du bist hlich.

  3. #3
    DIGItonium
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    Back light failure? Probably a loose connection along the lines of the CCFL tube and inverter. At worst, probably a failed inverter.

  4. #4
    Banned Motorcity's Avatar
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    Quote Originally Posted by DIGItonium View Post
    Back light failure? Probably a loose connection along the lines of the CCFL tube and inverter. At worst, probably a failed inverter.

    Or the backlight itself has failed, or is broken.
    I have a new lcd panel and a new ccfl backlight available.

  5. #5
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    I think the problem is the VGA cable or the signal, because OSD is visible.
    Try different Modes (different resolution, frequency...)

  6. #6
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    when i put computer runing the led comes tu blue , i dont see the window but i know the monitor recieve the input vga, because is in auto power on, when no signal vga the led shows violet, when input signal vga the led shows blue , but i dont have a back light ,

  7. #7
    Variable Bitrate
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    What you mean OSD? On-Screen-what?
    When you can see anything on the display, you HAVE backlight.
    You can check it very easily, just turn off the light of the room or go into a dark room with the door closed. Put your finger on the led. If you see the slightest light coming from the display, you have backlight (usually, a 'black' LCD screen with backlight on will give you a possibility even to read).
    When the room remains pitch black, you have right and your BL is off.

  8. #8
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    I see in the center of lcd one rectangle with lethers very dark, ( maybe no signal) when i dont have anything plug in monitor and then the monitor goes off and the led shows violet.
    When i plug comp. in the monitor, the led show blue , when i turn off the comp. the led shows violet

  9. #9
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    OK. Try to present a picture with good contrast. e.g. bouncing box in dxdiag
    or a white on black text with HUGE letters in Windows Paint.
    Is anything (dark, but visible) on the screen? Even when you light it with a strong lamp?

    Normally (when it WAS good before), what was the color of the led during displaying the picture? I suppose blue.

    In this context, I think there is something with the backlight.
    Open the case, check the backlight fuse. Then check the two main switching transistors (or FETs) next to the transformer. These are trivial and frequent errors. When it does not help, ask an expert or a serviceman.

  10. #10
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    do you have any photo of this fets? where is the fuse of back light??? on pcb or lcd????
    tanks???

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