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820-3332 no backlight

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  • #16
    U9701 gets all necessary signals and power.
    Check R9708/09 and all 6 return resistors.
    Verify all traces and solders.
    Try again another known good (compatible) screen; allow 1 minute before measure.

    Remember, all voltages/signals MUST be measured with LCD connected.
    Last edited by 2informaticos; 3 weeks ago.

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    • #17
      r9708/09 45/47k resistance
      return resistors all have around .4v
      pins 3-8 on j9000 also have .4 so i think traces good.
      i will try another lcd

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      • #18
        no luck with another lcd.

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        • #19
          This one also solved u9701 - my whole batch is %^#$&!
          pulled from donor boards everything good!

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