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Reply To: [Solved] MagSafe 3 Blinking Amber LED and Refusing to Charge on MacBook Pro 16″ M1 Pro: How to resolve SMC Power Delivery controller handshake fault
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Home › Forums › Battery, Charging & Thermal Care › [Solved] MagSafe 3 Blinking Amber LED and Refusing to Charge on MacBook Pro 16″ M1 Pro: How to resolve SMC Power Delivery controller handshake fault › Reply To: [Solved] MagSafe 3 Blinking Amber LED and Refusing to Charge on MacBook Pro 16″ M1 Pro: How to resolve SMC Power Delivery controller handshake fault
Emily HartCompletely discharging GaN brick capacitors, cleaning pogo pins with 99% IPA, and triggering PMU cold reset.
Here is the exact step-by-step diagnostic and remediation procedure verified by Apple Certified Support Professionals:
- Unplug power brick from the wall and disconnect MagSafe cable. Wait 2 full minutes for capacitors to discharge.
- Clean the 5 gold spring-loaded pins with 99% isopropyl alcohol and a lint-free swab.
- Plug adapter directly to wall, connect MagSafe to Mac, and power on. The LED will illuminate steady amber.
Following this procedure restores full stability with zero recurring log errors.