Submerge the logic board in isopropyl alcohol, and allow it to soak long enough to loosen hardened residue, and to displace any remaining water or other liquid. Use a soft brush to remove visible corrosion and residue.
Residue from motherboard left in isopropyl alcohol container.
Clean all flex ends, battery contacts, connectors, chips, and fuses on motherboard with a soft brush.
Repeat cleaning if necessary, or if traces of residue are still visible.
Allow the logic board or other parts to dry completely before reassembly.
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