A2141 No audio on speakers, yes audio on headphone jacks.

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  • abajor
    Senior Member
    • Feb 2024
    • 175
    • United States
    #1

    A2141 No audio on speakers, yes audio on headphone jacks.

    I just can't escape Apples most CURSED laptop the dreaded A2141.

    Can't find any info on this speaker problem. I've been digging through the schematics and found there's a separate chip U6300 to drive the headphone jack.
    It appears all of the audio signal is transmitted using i2S. It's pretty wild that the internal speakers have 3 amplifiers each. I'm assuming whatever provides the clock or routes the signal to the speaker amps has an issue?
    U3900 is as far as I've gotten in my exploration.

    Anybody know this issue? Is it fixable? U3900 looks like something I do not want to mess with.
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