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[SOLVED]A1466 - 820-3437 - Backlight works but only on low

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  • [SOLVED]A1466 - 820-3437 - Backlight works but only on low

    I'm trying to find out if there is a problem with the actual backlight or the circuit.

    I'm getting around 24v on PPHV_S0SW_LCDBKLT until the brightness is turned up, then it jumps all over.
    I don't have another assembly for this model in stock to simply try another.

    What do you recon the odds are that its the actual backlight in the screen thats the issue?

  • #2
    Had a WLED cause this on an air recently.

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    • #3
      Very likely that it is just a bad LP8550 or corrosion around it.

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      • #4
        Thank you Duke, a gentle flux and heat of LP8550 (U7701) did the trick

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