If your MacBook Pro 16” A2141 (820-01700) is not turning on, showing no display, or drawing abnormal current, a partial short on the G3H power rail could be the cause. In this detailed repair case, we explain how to properly diagnose a G3H short using resistance testing, rail isolation, and controlled voltage injection techniques. We also discuss a common failure component — the TAS5770AC0 audio amplifier IC — and important compatibility considerations when sourcing replacement parts.
Instead of replacing the entire logic board, professional board-level repair and microsoldering can restore your MacBook and save significant costs.
We are MacBook repair experts based in Hamilton, New Zealand, specializing in logic board repair, liquid damage restoration, short circuit diagnosis, and complex motherboard repairs.
📍 937 Victoria Street, Hamilton
📞 07 839 4188
📦 NZ-wide mail-in repair service available
We also repair laptops, iPhones, iPads, tablets, PlayStation, Xbox, and other electronic devices — including those considered “unfixable” by other repair shops.
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