The power IC distributes voltage across the mainboard.
When faulty, device won’t charge or power on, even with a good battery.
Repair involves removing the mainboard, replacing the damaged IC.
Tools needed: hot-air station, microscope, professional solder paste.
Post-repair testing includes charge current and voltage regulation.
Repair cost is reasonable; time required: 1–2 hours.
DIY not recommended without micro-soldering skills.