MACBOOK PRO 16 INCH Not Charging

ISL9240 Charging Management IC

Expert analysis from iFixit indicates a common failure in the 16-inch series involving the ISL charging driver chips on the logic board. This chip manages the handshake between the USB-C PD controller and the battery; when it fails, the machine may show a battery icon but refuse to initiate the high-voltage charging rail.

USB-C DC-In Power Board

The USB-C ports on the 16-inch models are modular sub-assemblies. Mechanical wear, debris, or liquid ingress often causes pin-to-shell shorts or oxidation, preventing the 20V/5A power delivery profile from being negotiated, leading to a 'Not Charging' status despite a physical connection.

SKU: 821-02220-A

DeoxIT D5 Contact Cleaner Kit

Corrosion or charring on the charge connector pins is a documented cause for intermittent or failed charging. This specialized electrical cleaner removes non-conductive oxidation layers and restores the low-resistance path required for the high-wattage charging throughput of the 16-inch power supply.