Discover why your charger is failing and how to fix this power handshake glitch.
Your M3 MacBook negotiates power with the charger; if sensors detect any mismatch, charging is vetoed.
Conductive dust on MagSafe pogo-pins causes resistance, triggering a protective lockout to prevent dangerous electrical arcing.
The LED indicates a successful system handshake, not just that power is currently flowing through.
M3 chips lack manual SMC resets, requiring deeper system re-negotiation when the power daemon stalls.
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