Service: Power Management IC micro-soldering repair or replacement on iPhone 11 Pro Max motherboard
Symptoms included: No power-on, no charging, slow charging, overheating, abnormal battery drain
Process: Software & battery diagnostic; logic board removal; micro-soldering replacement of the Power IC; post-repair testing; reassembly.
Parts: OEM or high-grade Power IC sourced from donor boards or reputable suppliers
Warranty: About 3 months, depending on service provider