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Display problem LA-7902P

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    Display problem LA-7902P

    Hello.
    I have a problem with a LA-7902P motherboard. It does not display anything on the internal display, only on the external display via HDMI. I reballed to PCH because I miss ENVDD_PCH, the same result.
    Can anyone tell me what volts I should have on LCD_VCC_TEST_EN and ENVDD_PHC to know when it works properly and if ENVDD_PHC is missing should the chip be changed?

    Thank you.
    Attached Files

    #2
    Re: Display problem LA-7902P

    Hello, greetings from Brazil.

    The ENVDD_PHC signal must be 3v.

    The LCD_VCC_TEST_EN signal is for you to inject 3v (to diagnose the defect).
    I'll leave a picture of the correct voltage:

    Attached Files
    Last edited by SMDFlea; 07-31-2020, 02:49 AM.

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