Lenovo M920z AIO-PC

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  • chick0n
    Member
    • Mar 2017
    • 22
    • Germany
    #1

    Lenovo M920z AIO-PC


    The M920z shows only Black and White colored picture on integrated LCD, even in the BIOS. I swapped the Mainboard to another M920z. Still Shows BW screen.
    So problem seems to be on Mainboard.
    I Updated and Reset BIOS. No change.
    M920z uses "IQ370SV" Mainboard.

    What could be the problem?

    Schematic - https://www.badcaps.net/forum/troubl...v1-0-schematic

    Thanks!
    Tags: None
    • chick0n
      Member
      • Mar 2017
      • 22
      • Germany
      #2
      I think, I got it working again.

      First I swapped the U148 RTD2526A "Display Scaler" Chip, from Donor Board. - Nothing Changed.
      Then I swapped the two U7,U8 EEPROMs for the Scaler Chip.

      Then I got Color in BIOS again.

      After Windows Booting, the Display switched back to Black White...
      Then I Reset Windows.

      At the moment I have Color Display again....

      Maybe I should have Reset Windows first...

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